tc_dma_3000_500.c revision 1.5
1 /* $NetBSD: tc_dma_3000_500.c,v 1.5 1998/02/04 07:37:31 thorpej 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> /* RCS ID & Copyright macro defns */ 41 42 __KERNEL_RCSID(0, "$NetBSD: tc_dma_3000_500.c,v 1.5 1998/02/04 07:37:31 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 _bus_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 bus_dmamap_t map; 129 int error; 130 131 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 132 boundary, flags, dmamp); 133 if (error) 134 return (error); 135 136 map = *dmamp; 137 138 if (flags & BUS_DMA_ALLOCNOW) { 139 error = alpha_sgmap_alloc(map, round_page(size), 140 &tdsi->tdsi_sgmap, flags); 141 if (error) 142 tc_bus_dmamap_destroy_sgmap(t, map); 143 } 144 145 return (error); 146 } 147 148 /* 149 * Destroy a TurboChannel SGMAP-mapped DMA map. 150 */ 151 void 152 tc_bus_dmamap_destroy_sgmap(t, map) 153 bus_dma_tag_t t; 154 bus_dmamap_t map; 155 { 156 struct tc_dma_slot_info *tdsi = t->_cookie; 157 158 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 159 alpha_sgmap_free(map, &tdsi->tdsi_sgmap); 160 161 _bus_dmamap_destroy(t, map); 162 } 163 164 /* 165 * Load a TurboChannel SGMAP-mapped DMA map with a linear buffer. 166 */ 167 int 168 tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 169 bus_dma_tag_t t; 170 bus_dmamap_t map; 171 void *buf; 172 bus_size_t buflen; 173 struct proc *p; 174 int flags; 175 { 176 struct tc_dma_slot_info *tdsi = t->_cookie; 177 178 return (tc_sgmap_load(t, map, buf, buflen, p, flags, 179 &tdsi->tdsi_sgmap)); 180 } 181 182 /* 183 * Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain. 184 */ 185 int 186 tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 187 bus_dma_tag_t t; 188 bus_dmamap_t map; 189 struct mbuf *m; 190 int flags; 191 { 192 struct tc_dma_slot_info *tdsi = t->_cookie; 193 194 return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap)); 195 } 196 197 /* 198 * Load a TurboChannel SGMAP-mapped DMA map with a uio. 199 */ 200 int 201 tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 202 bus_dma_tag_t t; 203 bus_dmamap_t map; 204 struct uio *uio; 205 int flags; 206 { 207 struct tc_dma_slot_info *tdsi = t->_cookie; 208 209 return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap)); 210 } 211 212 /* 213 * Load a TurboChannel SGMAP-mapped DMA map with raw memory. 214 */ 215 int 216 tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 217 bus_dma_tag_t t; 218 bus_dmamap_t map; 219 bus_dma_segment_t *segs; 220 int nsegs; 221 bus_size_t size; 222 int flags; 223 { 224 struct tc_dma_slot_info *tdsi = t->_cookie; 225 226 return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, 227 &tdsi->tdsi_sgmap)); 228 } 229 230 /* 231 * Unload a TurboChannel SGMAP-mapped DMA map. 232 */ 233 void 234 tc_bus_dmamap_unload_sgmap(t, map) 235 bus_dma_tag_t t; 236 bus_dmamap_t map; 237 { 238 struct tc_dma_slot_info *tdsi = t->_cookie; 239 240 /* 241 * Invalidate any SGMAP page table entries used by this 242 * mapping. 243 */ 244 tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap); 245 246 /* 247 * Do the generic bits of the unload. 248 */ 249 _bus_dmamap_unload(t, map); 250 } 251
Indexes created Thu Oct 02 01:09:59 GMT 2025