tc_dma_3000_500.c revision 1.8
1 /* $NetBSD: tc_dma_3000_500.c,v 1.8 1998/06/03 18:25:54 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 1.8 1998/06/03 18:25:54 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 0, /* _wbase */ 60 0, /* _wsize */ 61 NULL, /* _next_window */ 62 0, /* _boundary */ 63 NULL, /* _sgmap */ 64 NULL, /* _get_tag */ 65 tc_bus_dmamap_create_sgmap, 66 tc_bus_dmamap_destroy_sgmap, 67 tc_bus_dmamap_load_sgmap, 68 tc_bus_dmamap_load_mbuf_sgmap, 69 tc_bus_dmamap_load_uio_sgmap, 70 tc_bus_dmamap_load_raw_sgmap, 71 tc_bus_dmamap_unload_sgmap, 72 _bus_dmamap_sync, 73 _bus_dmamem_alloc, 74 _bus_dmamem_free, 75 _bus_dmamem_map, 76 _bus_dmamem_unmap, 77 _bus_dmamem_mmap, 78 }; 79 80 struct tc_dma_slot_info { 81 struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */ 82 struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */ 83 }; 84 struct tc_dma_slot_info *tc_dma_slot_info; 85 86 void 87 tc_dma_init_3000_500(nslots) 88 int nslots; 89 { 90 extern struct alpha_bus_dma_tag tc_dmat_direct; 91 size_t sisize; 92 int i; 93 94 /* Allocate per-slot DMA info. */ 95 sisize = nslots * sizeof(struct tc_dma_slot_info); 96 tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT); 97 if (tc_dma_slot_info == NULL) 98 panic("tc_dma_init: can't allocate per-slot DMA info"); 99 bzero(tc_dma_slot_info, sisize); 100 101 /* Default all slots to direct-mapped. */ 102 for (i = 0; i < nslots; i++) 103 bcopy(&tc_dmat_direct, &tc_dma_slot_info[i].tdsi_dmat, 104 sizeof(tc_dma_slot_info[i].tdsi_dmat)); 105 } 106 107 /* 108 * Return the DMA tag for the given slot. 109 */ 110 bus_dma_tag_t 111 tc_dma_get_tag_3000_500(slot) 112 int slot; 113 { 114 115 return (&tc_dma_slot_info[slot].tdsi_dmat); 116 } 117 118 /* 119 * Create a TurboChannel SGMAP-mapped DMA map. 120 */ 121 int 122 tc_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 123 flags, dmamp) 124 bus_dma_tag_t t; 125 bus_size_t size; 126 int nsegments; 127 bus_size_t maxsegsz; 128 bus_size_t boundary; 129 int flags; 130 bus_dmamap_t *dmamp; 131 { 132 struct tc_dma_slot_info *tdsi = t->_cookie; 133 bus_dmamap_t map; 134 int error; 135 136 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 137 boundary, flags, dmamp); 138 if (error) 139 return (error); 140 141 map = *dmamp; 142 143 if (flags & BUS_DMA_ALLOCNOW) { 144 error = alpha_sgmap_alloc(map, round_page(size), 145 &tdsi->tdsi_sgmap, flags); 146 if (error) 147 tc_bus_dmamap_destroy_sgmap(t, map); 148 } 149 150 return (error); 151 } 152 153 /* 154 * Destroy a TurboChannel SGMAP-mapped DMA map. 155 */ 156 void 157 tc_bus_dmamap_destroy_sgmap(t, map) 158 bus_dma_tag_t t; 159 bus_dmamap_t map; 160 { 161 struct tc_dma_slot_info *tdsi = t->_cookie; 162 163 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 164 alpha_sgmap_free(map, &tdsi->tdsi_sgmap); 165 166 _bus_dmamap_destroy(t, map); 167 } 168 169 /* 170 * Load a TurboChannel SGMAP-mapped DMA map with a linear buffer. 171 */ 172 int 173 tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 174 bus_dma_tag_t t; 175 bus_dmamap_t map; 176 void *buf; 177 bus_size_t buflen; 178 struct proc *p; 179 int flags; 180 { 181 struct tc_dma_slot_info *tdsi = t->_cookie; 182 183 return (tc_sgmap_load(t, map, buf, buflen, p, flags, 184 &tdsi->tdsi_sgmap)); 185 } 186 187 /* 188 * Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain. 189 */ 190 int 191 tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 192 bus_dma_tag_t t; 193 bus_dmamap_t map; 194 struct mbuf *m; 195 int flags; 196 { 197 struct tc_dma_slot_info *tdsi = t->_cookie; 198 199 return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap)); 200 } 201 202 /* 203 * Load a TurboChannel SGMAP-mapped DMA map with a uio. 204 */ 205 int 206 tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 207 bus_dma_tag_t t; 208 bus_dmamap_t map; 209 struct uio *uio; 210 int flags; 211 { 212 struct tc_dma_slot_info *tdsi = t->_cookie; 213 214 return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap)); 215 } 216 217 /* 218 * Load a TurboChannel SGMAP-mapped DMA map with raw memory. 219 */ 220 int 221 tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 222 bus_dma_tag_t t; 223 bus_dmamap_t map; 224 bus_dma_segment_t *segs; 225 int nsegs; 226 bus_size_t size; 227 int flags; 228 { 229 struct tc_dma_slot_info *tdsi = t->_cookie; 230 231 return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, 232 &tdsi->tdsi_sgmap)); 233 } 234 235 /* 236 * Unload a TurboChannel SGMAP-mapped DMA map. 237 */ 238 void 239 tc_bus_dmamap_unload_sgmap(t, map) 240 bus_dma_tag_t t; 241 bus_dmamap_t map; 242 { 243 struct tc_dma_slot_info *tdsi = t->_cookie; 244 245 /* 246 * Invalidate any SGMAP page table entries used by this 247 * mapping. 248 */ 249 tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap); 250 251 /* 252 * Do the generic bits of the unload. 253 */ 254 _bus_dmamap_unload(t, map); 255 } 256
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