tc_dma_3000_500.c revision 1.2.6.1
1 /* $NetBSD: tc_dma_3000_500.c,v 1.2.6.1 1997/09/04 00:54:20 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 <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 41 42 __KERNEL_RCSID(0, "$NetBSD: tc_dma_3000_500.c,v 1.2.6.1 1997/09/04 00:54:20 thorpej Exp $"); 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/malloc.h> 48 #include <vm/vm.h> 49 50 #define _ALPHA_BUS_DMA_PRIVATE 51 #include <machine/bus.h> 52 53 #include <dev/tc/tcvar.h> 54 #include <alpha/tc/tc_sgmap.h> 55 #include <alpha/tc/tc_dma_3000_500.h> 56 57 struct alpha_bus_dma_tag tc_dmat_sgmap = { 58 NULL, /* _cookie */ 59 NULL, /* _get_tag */ 60 tc_bus_dmamap_create_sgmap, 61 tc_bus_dmamap_destroy_sgmap, 62 tc_bus_dmamap_load_sgmap, 63 tc_bus_dmamap_load_mbuf_sgmap, 64 tc_bus_dmamap_load_uio_sgmap, 65 tc_bus_dmamap_load_raw_sgmap, 66 tc_bus_dmamap_unload_sgmap, 67 NULL, /* _dmamap_sync */ 68 _bus_dmamem_alloc, 69 _bus_dmamem_free, 70 _bus_dmamem_map, 71 _bus_dmamem_unmap, 72 _bus_dmamem_mmap, 73 }; 74 75 struct tc_dma_slot_info { 76 struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */ 77 struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */ 78 }; 79 struct tc_dma_slot_info *tc_dma_slot_info; 80 81 void 82 tc_dma_init_3000_500(nslots) 83 int nslots; 84 { 85 extern struct alpha_bus_dma_tag tc_dmat_direct; 86 size_t sisize; 87 int i; 88 89 /* Allocate per-slot DMA info. */ 90 sisize = nslots * sizeof(struct tc_dma_slot_info); 91 tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT); 92 if (tc_dma_slot_info == NULL) 93 panic("tc_dma_init: can't allocate per-slot DMA info"); 94 bzero(tc_dma_slot_info, sisize); 95 96 /* Default all slots to direct-mapped. */ 97 for (i = 0; i < nslots; i++) 98 bcopy(&tc_dmat_direct, &tc_dma_slot_info[i].tdsi_dmat, 99 sizeof(tc_dma_slot_info[i].tdsi_dmat)); 100 } 101 102 /* 103 * Return the DMA tag for the given slot. 104 */ 105 bus_dma_tag_t 106 tc_dma_get_tag_3000_500(slot) 107 int slot; 108 { 109 110 return (&tc_dma_slot_info[slot].tdsi_dmat); 111 } 112 113 /* 114 * Create a TurboChannel SGMAP-mapped DMA map. 115 */ 116 int 117 tc_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 118 flags, dmamp) 119 bus_dma_tag_t t; 120 bus_size_t size; 121 int nsegments; 122 bus_size_t maxsegsz; 123 bus_size_t boundary; 124 int flags; 125 bus_dmamap_t *dmamp; 126 { 127 struct tc_dma_slot_info *tdsi = t->_cookie; 128 struct alpha_sgmap_cookie *a; 129 bus_dmamap_t map; 130 int error; 131 132 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 133 boundary, flags, dmamp); 134 if (error) 135 return (error); 136 137 map = *dmamp; 138 139 a = malloc(sizeof(struct alpha_sgmap_cookie), M_DEVBUF, 140 (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK); 141 if (a == NULL) { 142 _bus_dmamap_destroy(t, map); 143 return (ENOMEM); 144 } 145 bzero(a, sizeof(struct alpha_sgmap_cookie)); 146 map->_dm_sgcookie = a; 147 148 if (flags & BUS_DMA_ALLOCNOW) { 149 error = alpha_sgmap_alloc(map, round_page(size), 150 &tdsi->tdsi_sgmap, flags); 151 if (error) 152 tc_bus_dmamap_destroy_sgmap(t, map); 153 } 154 155 return (error); 156 } 157 158 /* 159 * Destroy a TurboChannel SGMAP-mapped DMA map. 160 */ 161 void 162 tc_bus_dmamap_destroy_sgmap(t, map) 163 bus_dma_tag_t t; 164 bus_dmamap_t map; 165 { 166 struct tc_dma_slot_info *tdsi = t->_cookie; 167 struct alpha_sgmap_cookie *a = map->_dm_sgcookie; 168 169 if (a->apdc_flags & APDC_HAS_SGMAP) 170 alpha_sgmap_free(&tdsi->tdsi_sgmap, a); 171 172 free(a, M_DEVBUF); 173 _bus_dmamap_destroy(t, map); 174 } 175 176 /* 177 * Load a TurboChannel SGMAP-mapped DMA map with a linear buffer. 178 */ 179 int 180 tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 181 bus_dma_tag_t t; 182 bus_dmamap_t map; 183 void *buf; 184 bus_size_t buflen; 185 struct proc *p; 186 int flags; 187 { 188 struct tc_dma_slot_info *tdsi = t->_cookie; 189 190 return (tc_sgmap_load(t, map, buf, buflen, p, flags, 191 &tdsi->tdsi_sgmap)); 192 } 193 194 /* 195 * Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain. 196 */ 197 int 198 tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 199 bus_dma_tag_t t; 200 bus_dmamap_t map; 201 struct mbuf *m; 202 int flags; 203 { 204 struct tc_dma_slot_info *tdsi = t->_cookie; 205 206 return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap)); 207 } 208 209 /* 210 * Load a TurboChannel SGMAP-mapped DMA map with a uio. 211 */ 212 int 213 tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 214 bus_dma_tag_t t; 215 bus_dmamap_t map; 216 struct uio *uio; 217 int flags; 218 { 219 struct tc_dma_slot_info *tdsi = t->_cookie; 220 221 return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap)); 222 } 223 224 /* 225 * Load a TurboChannel SGMAP-mapped DMA map with raw memory. 226 */ 227 int 228 tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 229 bus_dma_tag_t t; 230 bus_dmamap_t map; 231 bus_dma_segment_t *segs; 232 int nsegs; 233 bus_size_t size; 234 int flags; 235 { 236 struct tc_dma_slot_info *tdsi = t->_cookie; 237 238 return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, 239 &tdsi->tdsi_sgmap)); 240 } 241 242 /* 243 * Unload a TurboChannel SGMAP-mapped DMA map. 244 */ 245 void 246 tc_bus_dmamap_unload_sgmap(t, map) 247 bus_dma_tag_t t; 248 bus_dmamap_t map; 249 { 250 struct tc_dma_slot_info *tdsi = t->_cookie; 251 252 /* 253 * Invalidate any SGMAP page table entries used by this 254 * mapping. 255 */ 256 tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap); 257 258 /* 259 * Do the generic bits of the unload. 260 */ 261 _bus_dmamap_unload(t, map); 262 } 263
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