tc_dma_3000_500.c revision 1.9
1 /* $NetBSD: tc_dma_3000_500.c,v 1.9 1999/11/16 12:26:42 enami 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 1.9 1999/11/16 12:26:42 enami Exp $"); 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/device.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 0, /* _wbase */ 61 0, /* _wsize */ 62 NULL, /* _next_window */ 63 0, /* _boundary */ 64 NULL, /* _sgmap */ 65 NULL, /* _get_tag */ 66 tc_bus_dmamap_create_sgmap, 67 tc_bus_dmamap_destroy_sgmap, 68 tc_bus_dmamap_load_sgmap, 69 tc_bus_dmamap_load_mbuf_sgmap, 70 tc_bus_dmamap_load_uio_sgmap, 71 tc_bus_dmamap_load_raw_sgmap, 72 tc_bus_dmamap_unload_sgmap, 73 _bus_dmamap_sync, 74 _bus_dmamem_alloc, 75 _bus_dmamem_free, 76 _bus_dmamem_map, 77 _bus_dmamem_unmap, 78 _bus_dmamem_mmap, 79 }; 80 81 struct tc_dma_slot_info { 82 struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */ 83 struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */ 84 }; 85 struct tc_dma_slot_info *tc_dma_slot_info; 86 87 void 88 tc_dma_init_3000_500(nslots) 89 int nslots; 90 { 91 extern struct alpha_bus_dma_tag tc_dmat_direct; 92 size_t sisize; 93 int i; 94 95 /* Allocate per-slot DMA info. */ 96 sisize = nslots * sizeof(struct tc_dma_slot_info); 97 tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT); 98 if (tc_dma_slot_info == NULL) 99 panic("tc_dma_init: can't allocate per-slot DMA info"); 100 bzero(tc_dma_slot_info, sisize); 101 102 /* Default all slots to direct-mapped. */ 103 for (i = 0; i < nslots; i++) 104 bcopy(&tc_dmat_direct, &tc_dma_slot_info[i].tdsi_dmat, 105 sizeof(tc_dma_slot_info[i].tdsi_dmat)); 106 } 107 108 /* 109 * Return the DMA tag for the given slot. 110 */ 111 bus_dma_tag_t 112 tc_dma_get_tag_3000_500(slot) 113 int slot; 114 { 115 116 return (&tc_dma_slot_info[slot].tdsi_dmat); 117 } 118 119 /* 120 * Create a TurboChannel SGMAP-mapped DMA map. 121 */ 122 int 123 tc_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 124 flags, dmamp) 125 bus_dma_tag_t t; 126 bus_size_t size; 127 int nsegments; 128 bus_size_t maxsegsz; 129 bus_size_t boundary; 130 int flags; 131 bus_dmamap_t *dmamp; 132 { 133 struct tc_dma_slot_info *tdsi = t->_cookie; 134 bus_dmamap_t map; 135 int error; 136 137 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 138 boundary, flags, dmamp); 139 if (error) 140 return (error); 141 142 map = *dmamp; 143 144 if (flags & BUS_DMA_ALLOCNOW) { 145 error = alpha_sgmap_alloc(map, round_page(size), 146 &tdsi->tdsi_sgmap, flags); 147 if (error) 148 tc_bus_dmamap_destroy_sgmap(t, map); 149 } 150 151 return (error); 152 } 153 154 /* 155 * Destroy a TurboChannel SGMAP-mapped DMA map. 156 */ 157 void 158 tc_bus_dmamap_destroy_sgmap(t, map) 159 bus_dma_tag_t t; 160 bus_dmamap_t map; 161 { 162 struct tc_dma_slot_info *tdsi = t->_cookie; 163 164 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 165 alpha_sgmap_free(map, &tdsi->tdsi_sgmap); 166 167 _bus_dmamap_destroy(t, map); 168 } 169 170 /* 171 * Load a TurboChannel SGMAP-mapped DMA map with a linear buffer. 172 */ 173 int 174 tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 175 bus_dma_tag_t t; 176 bus_dmamap_t map; 177 void *buf; 178 bus_size_t buflen; 179 struct proc *p; 180 int flags; 181 { 182 struct tc_dma_slot_info *tdsi = t->_cookie; 183 184 return (tc_sgmap_load(t, map, buf, buflen, p, flags, 185 &tdsi->tdsi_sgmap)); 186 } 187 188 /* 189 * Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain. 190 */ 191 int 192 tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 193 bus_dma_tag_t t; 194 bus_dmamap_t map; 195 struct mbuf *m; 196 int flags; 197 { 198 struct tc_dma_slot_info *tdsi = t->_cookie; 199 200 return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap)); 201 } 202 203 /* 204 * Load a TurboChannel SGMAP-mapped DMA map with a uio. 205 */ 206 int 207 tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 208 bus_dma_tag_t t; 209 bus_dmamap_t map; 210 struct uio *uio; 211 int flags; 212 { 213 struct tc_dma_slot_info *tdsi = t->_cookie; 214 215 return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap)); 216 } 217 218 /* 219 * Load a TurboChannel SGMAP-mapped DMA map with raw memory. 220 */ 221 int 222 tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 223 bus_dma_tag_t t; 224 bus_dmamap_t map; 225 bus_dma_segment_t *segs; 226 int nsegs; 227 bus_size_t size; 228 int flags; 229 { 230 struct tc_dma_slot_info *tdsi = t->_cookie; 231 232 return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, 233 &tdsi->tdsi_sgmap)); 234 } 235 236 /* 237 * Unload a TurboChannel SGMAP-mapped DMA map. 238 */ 239 void 240 tc_bus_dmamap_unload_sgmap(t, map) 241 bus_dma_tag_t t; 242 bus_dmamap_t map; 243 { 244 struct tc_dma_slot_info *tdsi = t->_cookie; 245 246 /* 247 * Invalidate any SGMAP page table entries used by this 248 * mapping. 249 */ 250 tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap); 251 252 /* 253 * Do the generic bits of the unload. 254 */ 255 _bus_dmamap_unload(t, map); 256 } 257
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