gapspci_dma.c revision 1.3.2.2
1 1.3.2.2 bouyer /* $NetBSD: gapspci_dma.c,v 1.3.2.2 2001/02/11 19:09:16 bouyer Exp $ */ 2 1.3.2.2 bouyer 3 1.3.2.2 bouyer /*- 4 1.3.2.2 bouyer * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 1.3.2.2 bouyer * All rights reserved. 6 1.3.2.2 bouyer * 7 1.3.2.2 bouyer * This code is derived from software contributed to The NetBSD Foundation 8 1.3.2.2 bouyer * by Jason R. Thorpe. 9 1.3.2.2 bouyer * 10 1.3.2.2 bouyer * Redistribution and use in source and binary forms, with or without 11 1.3.2.2 bouyer * modification, are permitted provided that the following conditions 12 1.3.2.2 bouyer * are met: 13 1.3.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 14 1.3.2.2 bouyer * notice, this list of conditions and the following disclaimer. 15 1.3.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 16 1.3.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 17 1.3.2.2 bouyer * documentation and/or other materials provided with the distribution. 18 1.3.2.2 bouyer * 3. All advertising materials mentioning features or use of this software 19 1.3.2.2 bouyer * must display the following acknowledgement: 20 1.3.2.2 bouyer * This product includes software developed by the NetBSD 21 1.3.2.2 bouyer * Foundation, Inc. and its contributors. 22 1.3.2.2 bouyer * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.3.2.2 bouyer * contributors may be used to endorse or promote products derived 24 1.3.2.2 bouyer * from this software without specific prior written permission. 25 1.3.2.2 bouyer * 26 1.3.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.3.2.2 bouyer * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.3.2.2 bouyer * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.3.2.2 bouyer * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.3.2.2 bouyer * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.3.2.2 bouyer * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.3.2.2 bouyer * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.3.2.2 bouyer * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.3.2.2 bouyer * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.3.2.2 bouyer * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.3.2.2 bouyer * POSSIBILITY OF SUCH DAMAGE. 37 1.3.2.2 bouyer */ 38 1.3.2.2 bouyer 39 1.3.2.2 bouyer /* 40 1.3.2.2 bouyer * Bus DMA implementation for the SEGA GAPS PCI bridge. 41 1.3.2.2 bouyer * 42 1.3.2.2 bouyer * NOTE: We only implement a small subset of what the bus_space(9) 43 1.3.2.2 bouyer * API specifies. Right now, the GAPS PCI bridge is only used for 44 1.3.2.2 bouyer * the Dreamcast Broadband Adatper, so we only provide what the 45 1.3.2.2 bouyer * pci(4) and rtk(4) drivers need. 46 1.3.2.2 bouyer */ 47 1.3.2.2 bouyer 48 1.3.2.2 bouyer #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 49 1.3.2.2 bouyer 50 1.3.2.2 bouyer #include <sys/param.h> 51 1.3.2.2 bouyer #include <sys/systm.h> 52 1.3.2.2 bouyer #include <sys/device.h> 53 1.3.2.2 bouyer #include <sys/mbuf.h> 54 1.3.2.2 bouyer #include <sys/extent.h> 55 1.3.2.2 bouyer #include <sys/malloc.h> 56 1.3.2.2 bouyer 57 1.3.2.2 bouyer #include <machine/cpu.h> 58 1.3.2.2 bouyer #include <machine/bus.h> 59 1.3.2.2 bouyer 60 1.3.2.2 bouyer #include <dev/pci/pcivar.h> 61 1.3.2.2 bouyer 62 1.3.2.2 bouyer #include <dreamcast/dev/g2/gapspcivar.h> 63 1.3.2.2 bouyer 64 1.3.2.2 bouyer #include <uvm/uvm_extern.h> 65 1.3.2.2 bouyer 66 1.3.2.2 bouyer int gaps_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t, 67 1.3.2.2 bouyer bus_size_t, int, bus_dmamap_t *); 68 1.3.2.2 bouyer void gaps_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); 69 1.3.2.2 bouyer int gaps_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, 70 1.3.2.2 bouyer struct proc *, int); 71 1.3.2.2 bouyer int gaps_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int); 72 1.3.2.2 bouyer int gaps_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, struct uio *, int); 73 1.3.2.2 bouyer int gaps_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 74 1.3.2.2 bouyer int, bus_size_t, int); 75 1.3.2.2 bouyer void gaps_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); 76 1.3.2.2 bouyer void gaps_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 77 1.3.2.2 bouyer bus_size_t, int); 78 1.3.2.2 bouyer 79 1.3.2.2 bouyer int gaps_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size, 80 1.3.2.2 bouyer bus_size_t alignment, bus_size_t boundary, bus_dma_segment_t *segs, 81 1.3.2.2 bouyer int nsegs, int *rsegs, int flags); 82 1.3.2.2 bouyer void gaps_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs, int nsegs); 83 1.3.2.2 bouyer int gaps_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs, int nsegs, 84 1.3.2.2 bouyer size_t size, caddr_t *kvap, int flags); 85 1.3.2.2 bouyer void gaps_dmamem_unmap(bus_dma_tag_t tag, caddr_t kva, size_t size); 86 1.3.2.2 bouyer paddr_t gaps_dmamem_mmap(bus_dma_tag_t tag, bus_dma_segment_t *segs, int nsegs, 87 1.3.2.2 bouyer off_t off, int prot, int flags); 88 1.3.2.2 bouyer 89 1.3.2.2 bouyer void 90 1.3.2.2 bouyer gaps_dma_init(struct gaps_softc *sc) 91 1.3.2.2 bouyer { 92 1.3.2.2 bouyer bus_dma_tag_t t = &sc->sc_dmat; 93 1.3.2.2 bouyer 94 1.3.2.2 bouyer memset(t, 0, sizeof(*t)); 95 1.3.2.2 bouyer 96 1.3.2.2 bouyer t->_cookie = sc; 97 1.3.2.2 bouyer t->_dmamap_create = gaps_dmamap_create; 98 1.3.2.2 bouyer t->_dmamap_destroy = gaps_dmamap_destroy; 99 1.3.2.2 bouyer t->_dmamap_load = gaps_dmamap_load; 100 1.3.2.2 bouyer t->_dmamap_load_mbuf = gaps_dmamap_load_mbuf; 101 1.3.2.2 bouyer t->_dmamap_load_uio = gaps_dmamap_load_uio; 102 1.3.2.2 bouyer t->_dmamap_load_raw = gaps_dmamap_load_raw; 103 1.3.2.2 bouyer t->_dmamap_unload = gaps_dmamap_unload; 104 1.3.2.2 bouyer t->_dmamap_sync = gaps_dmamap_sync; 105 1.3.2.2 bouyer 106 1.3.2.2 bouyer t->_dmamem_alloc = gaps_dmamem_alloc; 107 1.3.2.2 bouyer t->_dmamem_free = gaps_dmamem_free; 108 1.3.2.2 bouyer t->_dmamem_map = gaps_dmamem_map; 109 1.3.2.2 bouyer t->_dmamem_unmap = gaps_dmamem_unmap; 110 1.3.2.2 bouyer t->_dmamem_mmap = gaps_dmamem_mmap; 111 1.3.2.2 bouyer 112 1.3.2.2 bouyer /* 113 1.3.2.2 bouyer * The GAPS PCI bridge has 32k of DMA memory. We manage it 114 1.3.2.2 bouyer * with an extent map. 115 1.3.2.2 bouyer */ 116 1.3.2.2 bouyer sc->sc_dma_ex = extent_create("gaps dma", 117 1.3.2.2 bouyer sc->sc_dmabase, sc->sc_dmabase + (sc->sc_dmasize - 1), 118 1.3.2.2 bouyer M_DEVBUF, NULL, 0, EX_WAITOK | EXF_NOCOALESCE); 119 1.3.2.2 bouyer 120 1.3.2.2 bouyer if (bus_space_map(sc->sc_memt, sc->sc_dmabase, sc->sc_dmasize, 121 1.3.2.2 bouyer 0, &sc->sc_dma_memh) != 0) 122 1.3.2.2 bouyer panic("gaps_dma_init: can't map SRAM buffer"); 123 1.3.2.2 bouyer } 124 1.3.2.2 bouyer 125 1.3.2.2 bouyer /* 126 1.3.2.2 bouyer * A GAPS DMA map -- has the standard DMA map, plus some extra 127 1.3.2.2 bouyer * housekeeping data. 128 1.3.2.2 bouyer */ 129 1.3.2.2 bouyer struct gaps_dmamap { 130 1.3.2.2 bouyer struct dreamcast_bus_dmamap gd_dmamap; 131 1.3.2.2 bouyer void *gd_origbuf; 132 1.3.2.2 bouyer int gd_buftype; 133 1.3.2.2 bouyer }; 134 1.3.2.2 bouyer 135 1.3.2.2 bouyer #define GAPS_DMA_BUFTYPE_INVALID 0 136 1.3.2.2 bouyer #define GAPS_DMA_BUFTYPE_LINEAR 1 137 1.3.2.2 bouyer #define GAPS_DMA_BUFTYPE_MBUF 2 138 1.3.2.2 bouyer 139 1.3.2.2 bouyer int 140 1.3.2.2 bouyer gaps_dmamap_create(bus_dma_tag_t t, bus_size_t size, int nsegments, 141 1.3.2.2 bouyer bus_size_t maxsegsz, bus_size_t boundary, int flags, bus_dmamap_t *dmamap) 142 1.3.2.2 bouyer { 143 1.3.2.2 bouyer struct gaps_softc *sc = t->_cookie; 144 1.3.2.2 bouyer struct gaps_dmamap *gmap; 145 1.3.2.2 bouyer bus_dmamap_t map; 146 1.3.2.2 bouyer 147 1.3.2.2 bouyer /* 148 1.3.2.2 bouyer * Allocate an initialize the DMA map. The end of the map is 149 1.3.2.2 bouyer * a variable-sized array of segments, so we allocate enough 150 1.3.2.2 bouyer * room for them in one shot. Since the DMA map always includes 151 1.3.2.2 bouyer * one segment, and we only support one segment, this is really 152 1.3.2.2 bouyer * easy. 153 1.3.2.2 bouyer * 154 1.3.2.2 bouyer * Note we don't preserve the WAITOK or NOWAIT flags. Preservation 155 1.3.2.2 bouyer * of ALLOCNOW notifies others that we've reserved these resources 156 1.3.2.2 bouyer * and they are not to be freed. 157 1.3.2.2 bouyer */ 158 1.3.2.2 bouyer 159 1.3.2.2 bouyer gmap = malloc(sizeof(*gmap), M_DMAMAP, 160 1.3.2.2 bouyer (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK); 161 1.3.2.2 bouyer if (gmap == NULL) 162 1.3.2.2 bouyer return (ENOMEM); 163 1.3.2.2 bouyer 164 1.3.2.2 bouyer memset(gmap, 0, sizeof(*gmap)); 165 1.3.2.2 bouyer 166 1.3.2.2 bouyer gmap->gd_buftype = GAPS_DMA_BUFTYPE_INVALID; 167 1.3.2.2 bouyer 168 1.3.2.2 bouyer map = &gmap->gd_dmamap; 169 1.3.2.2 bouyer 170 1.3.2.2 bouyer map->_dm_size = size; 171 1.3.2.2 bouyer map->_dm_segcnt = 1; 172 1.3.2.2 bouyer map->_dm_maxsegsz = maxsegsz; 173 1.3.2.2 bouyer map->_dm_boundary = boundary; 174 1.3.2.2 bouyer map->_dm_flags = flags & ~(BUS_DMA_WAITOK|BUS_DMA_NOWAIT); 175 1.3.2.2 bouyer 176 1.3.2.2 bouyer if (flags & BUS_DMA_ALLOCNOW) { 177 1.3.2.2 bouyer u_long res; 178 1.3.2.2 bouyer int error; 179 1.3.2.2 bouyer 180 1.3.2.2 bouyer error = extent_alloc(sc->sc_dma_ex, size, 1024 /* XXX */, 181 1.3.2.2 bouyer map->_dm_boundary, 182 1.3.2.2 bouyer (flags & BUS_DMA_NOWAIT) ? EX_NOWAIT : EX_WAITOK, &res); 183 1.3.2.2 bouyer if (error) { 184 1.3.2.2 bouyer free(gmap, M_DEVBUF); 185 1.3.2.2 bouyer return (error); 186 1.3.2.2 bouyer } 187 1.3.2.2 bouyer 188 1.3.2.2 bouyer map->dm_segs[0].ds_addr = res; 189 1.3.2.2 bouyer map->dm_segs[0].ds_len = size; 190 1.3.2.2 bouyer 191 1.3.2.2 bouyer map->dm_mapsize = size; 192 1.3.2.2 bouyer map->dm_nsegs = 1; 193 1.3.2.2 bouyer } else { 194 1.3.2.2 bouyer map->dm_mapsize = 0; /* no valid mappings */ 195 1.3.2.2 bouyer map->dm_nsegs = 0; 196 1.3.2.2 bouyer } 197 1.3.2.2 bouyer 198 1.3.2.2 bouyer *dmamap = map; 199 1.3.2.2 bouyer 200 1.3.2.2 bouyer return (0); 201 1.3.2.2 bouyer } 202 1.3.2.2 bouyer 203 1.3.2.2 bouyer void 204 1.3.2.2 bouyer gaps_dmamap_destroy(bus_dma_tag_t t, bus_dmamap_t map) 205 1.3.2.2 bouyer { 206 1.3.2.2 bouyer struct gaps_softc *sc = t->_cookie; 207 1.3.2.2 bouyer 208 1.3.2.2 bouyer if (map->_dm_flags & BUS_DMA_ALLOCNOW) { 209 1.3.2.2 bouyer (void) extent_free(sc->sc_dma_ex, 210 1.3.2.2 bouyer map->dm_segs[0].ds_addr, 211 1.3.2.2 bouyer map->dm_mapsize, EX_NOWAIT); 212 1.3.2.2 bouyer } 213 1.3.2.2 bouyer free(map, M_DMAMAP); 214 1.3.2.2 bouyer } 215 1.3.2.2 bouyer 216 1.3.2.2 bouyer int 217 1.3.2.2 bouyer gaps_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *addr, 218 1.3.2.2 bouyer bus_size_t size, struct proc *p, int flags) 219 1.3.2.2 bouyer { 220 1.3.2.2 bouyer struct gaps_softc *sc = t->_cookie; 221 1.3.2.2 bouyer struct gaps_dmamap *gmap = (void *) map; 222 1.3.2.2 bouyer u_long res; 223 1.3.2.2 bouyer int error; 224 1.3.2.2 bouyer 225 1.3.2.2 bouyer if ((map->_dm_flags & BUS_DMA_ALLOCNOW) == 0) { 226 1.3.2.2 bouyer /* 227 1.3.2.2 bouyer * Make sure that on error condition we return 228 1.3.2.2 bouyer * "no valid mappings". 229 1.3.2.2 bouyer */ 230 1.3.2.2 bouyer map->dm_mapsize = 0; 231 1.3.2.2 bouyer map->dm_nsegs = 0; 232 1.3.2.2 bouyer } 233 1.3.2.2 bouyer 234 1.3.2.2 bouyer /* XXX Don't support DMA to process space right now. */ 235 1.3.2.2 bouyer if (p != NULL) 236 1.3.2.2 bouyer return (EINVAL); 237 1.3.2.2 bouyer 238 1.3.2.2 bouyer if (size > map->_dm_size) 239 1.3.2.2 bouyer return (EINVAL); 240 1.3.2.2 bouyer 241 1.3.2.2 bouyer error = extent_alloc(sc->sc_dma_ex, size, 1024 /* XXX */, 242 1.3.2.2 bouyer map->_dm_boundary, 243 1.3.2.2 bouyer (flags & BUS_DMA_NOWAIT) ? EX_NOWAIT : EX_WAITOK, &res); 244 1.3.2.2 bouyer if (error) 245 1.3.2.2 bouyer return (error); 246 1.3.2.2 bouyer 247 1.3.2.2 bouyer map->dm_segs[0].ds_addr = res; 248 1.3.2.2 bouyer map->dm_segs[0].ds_len = size; 249 1.3.2.2 bouyer 250 1.3.2.2 bouyer gmap->gd_origbuf = addr; 251 1.3.2.2 bouyer gmap->gd_buftype = GAPS_DMA_BUFTYPE_LINEAR; 252 1.3.2.2 bouyer 253 1.3.2.2 bouyer map->dm_mapsize = size; 254 1.3.2.2 bouyer map->dm_nsegs = 1; 255 1.3.2.2 bouyer 256 1.3.2.2 bouyer return (0); 257 1.3.2.2 bouyer } 258 1.3.2.2 bouyer 259 1.3.2.2 bouyer int 260 1.3.2.2 bouyer gaps_dmamap_load_mbuf(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m0, 261 1.3.2.2 bouyer int flags) 262 1.3.2.2 bouyer { 263 1.3.2.2 bouyer struct gaps_softc *sc = t->_cookie; 264 1.3.2.2 bouyer struct gaps_dmamap *gmap = (void *) map; 265 1.3.2.2 bouyer u_long res; 266 1.3.2.2 bouyer int error; 267 1.3.2.2 bouyer 268 1.3.2.2 bouyer if ((map->_dm_flags & BUS_DMA_ALLOCNOW) == 0) { 269 1.3.2.2 bouyer /* 270 1.3.2.2 bouyer * Make sure that on error condition we return 271 1.3.2.2 bouyer * "no valid mappings". 272 1.3.2.2 bouyer */ 273 1.3.2.2 bouyer map->dm_mapsize = 0; 274 1.3.2.2 bouyer map->dm_nsegs = 0; 275 1.3.2.2 bouyer } 276 1.3.2.2 bouyer 277 1.3.2.2 bouyer #ifdef DIAGNOSTIC 278 1.3.2.2 bouyer if ((m0->m_flags & M_PKTHDR) == 0) 279 1.3.2.2 bouyer panic("gaps_dmamap_load_mbuf: no packet header"); 280 1.3.2.2 bouyer #endif 281 1.3.2.2 bouyer 282 1.3.2.2 bouyer if (m0->m_pkthdr.len > map->_dm_size) 283 1.3.2.2 bouyer return (EINVAL); 284 1.3.2.2 bouyer 285 1.3.2.2 bouyer error = extent_alloc(sc->sc_dma_ex, m0->m_pkthdr.len, 1024 /* XXX */, 286 1.3.2.2 bouyer map->_dm_boundary, 287 1.3.2.2 bouyer (flags & BUS_DMA_NOWAIT) ? EX_NOWAIT : EX_WAITOK, &res); 288 1.3.2.2 bouyer if (error) 289 1.3.2.2 bouyer return (error); 290 1.3.2.2 bouyer 291 1.3.2.2 bouyer map->dm_segs[0].ds_addr = res; 292 1.3.2.2 bouyer map->dm_segs[0].ds_len = m0->m_pkthdr.len; 293 1.3.2.2 bouyer 294 1.3.2.2 bouyer gmap->gd_origbuf = m0; 295 1.3.2.2 bouyer gmap->gd_buftype = GAPS_DMA_BUFTYPE_MBUF; 296 1.3.2.2 bouyer 297 1.3.2.2 bouyer map->dm_mapsize = m0->m_pkthdr.len; 298 1.3.2.2 bouyer map->dm_nsegs = 1; 299 1.3.2.2 bouyer 300 1.3.2.2 bouyer return (0); 301 1.3.2.2 bouyer } 302 1.3.2.2 bouyer 303 1.3.2.2 bouyer int 304 1.3.2.2 bouyer gaps_dmamap_load_uio(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio, 305 1.3.2.2 bouyer int flags) 306 1.3.2.2 bouyer { 307 1.3.2.2 bouyer 308 1.3.2.2 bouyer printf("gaps_dmamap_load_uio: not implemented\n"); 309 1.3.2.2 bouyer return (EINVAL); 310 1.3.2.2 bouyer } 311 1.3.2.2 bouyer 312 1.3.2.2 bouyer int 313 1.3.2.2 bouyer gaps_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map, 314 1.3.2.2 bouyer bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags) 315 1.3.2.2 bouyer { 316 1.3.2.2 bouyer 317 1.3.2.2 bouyer printf("gaps_dmamap_load_raw: not implemented\n"); 318 1.3.2.2 bouyer return (EINVAL); 319 1.3.2.2 bouyer } 320 1.3.2.2 bouyer 321 1.3.2.2 bouyer void 322 1.3.2.2 bouyer gaps_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map) 323 1.3.2.2 bouyer { 324 1.3.2.2 bouyer struct gaps_softc *sc = t->_cookie; 325 1.3.2.2 bouyer struct gaps_dmamap *gmap = (void *) map; 326 1.3.2.2 bouyer 327 1.3.2.2 bouyer if (gmap->gd_buftype == GAPS_DMA_BUFTYPE_INVALID) { 328 1.3.2.2 bouyer printf("gaps_dmamap_unload: DMA map not loaded!\n"); 329 1.3.2.2 bouyer return; 330 1.3.2.2 bouyer } 331 1.3.2.2 bouyer 332 1.3.2.2 bouyer if ((map->_dm_flags & BUS_DMA_ALLOCNOW) == 0) { 333 1.3.2.2 bouyer (void) extent_free(sc->sc_dma_ex, 334 1.3.2.2 bouyer map->dm_segs[0].ds_addr, 335 1.3.2.2 bouyer map->dm_mapsize, EX_NOWAIT); 336 1.3.2.2 bouyer 337 1.3.2.2 bouyer map->dm_mapsize = 0; 338 1.3.2.2 bouyer map->dm_nsegs = 0; 339 1.3.2.2 bouyer } 340 1.3.2.2 bouyer 341 1.3.2.2 bouyer gmap->gd_buftype = GAPS_DMA_BUFTYPE_INVALID; 342 1.3.2.2 bouyer } 343 1.3.2.2 bouyer 344 1.3.2.2 bouyer void 345 1.3.2.2 bouyer gaps_dmamap_sync(bus_dma_tag_t t, bus_dmamap_t map, bus_addr_t offset, 346 1.3.2.2 bouyer bus_size_t len, int ops) 347 1.3.2.2 bouyer { 348 1.3.2.2 bouyer struct gaps_softc *sc = t->_cookie; 349 1.3.2.2 bouyer struct gaps_dmamap *gmap = (void *) map; 350 1.3.2.2 bouyer bus_addr_t dmaoff = map->dm_segs[0].ds_addr - sc->sc_dmabase; 351 1.3.2.2 bouyer 352 1.3.2.2 bouyer /* 353 1.3.2.2 bouyer * Mixing PRE and POST operations is not allowed. 354 1.3.2.2 bouyer */ 355 1.3.2.2 bouyer if ((ops & (BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE)) != 0 && 356 1.3.2.2 bouyer (ops & (BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE)) != 0) 357 1.3.2.2 bouyer panic("gaps_dmamap_sync: mix PRE and POST"); 358 1.3.2.2 bouyer 359 1.3.2.2 bouyer #ifdef DIAGNOSTIC 360 1.3.2.2 bouyer if ((ops & (BUS_DMASYNC_PREWRITE|BUS_DMASYNC_POSTREAD)) != 0) { 361 1.3.2.2 bouyer if (offset >= map->dm_mapsize) { 362 1.3.2.2 bouyer printf("offset 0x%lx mapsize 0x%lx\n", 363 1.3.2.2 bouyer offset, map->dm_mapsize); 364 1.3.2.2 bouyer panic("gaps_dmamap_sync: bad offset"); 365 1.3.2.2 bouyer } 366 1.3.2.2 bouyer if (len == 0 || (offset + len) > map->dm_mapsize) { 367 1.3.2.2 bouyer printf("len 0x%lx offset 0x%lx mapsize 0x%lx\n", 368 1.3.2.2 bouyer len, offset, map->dm_mapsize); 369 1.3.2.2 bouyer panic("gaps_dmamap_sync: bad length"); 370 1.3.2.2 bouyer } 371 1.3.2.2 bouyer } 372 1.3.2.2 bouyer #endif 373 1.3.2.2 bouyer 374 1.3.2.2 bouyer switch (gmap->gd_buftype) { 375 1.3.2.2 bouyer case GAPS_DMA_BUFTYPE_INVALID: 376 1.3.2.2 bouyer printf("gaps_dmamap_sync: DMA map is not loaded!\n"); 377 1.3.2.2 bouyer return; 378 1.3.2.2 bouyer 379 1.3.2.2 bouyer case GAPS_DMA_BUFTYPE_LINEAR: 380 1.3.2.2 bouyer /* 381 1.3.2.2 bouyer * Nothing to do for pre-read. 382 1.3.2.2 bouyer */ 383 1.3.2.2 bouyer 384 1.3.2.2 bouyer if (ops & BUS_DMASYNC_PREWRITE) { 385 1.3.2.2 bouyer /* 386 1.3.2.2 bouyer * Copy the caller's buffer to the SRAM buffer. 387 1.3.2.2 bouyer */ 388 1.3.2.2 bouyer bus_space_write_region_1(sc->sc_memt, 389 1.3.2.2 bouyer sc->sc_dma_memh, 390 1.3.2.2 bouyer dmaoff + offset, 391 1.3.2.2 bouyer (u_int8_t *)gmap->gd_origbuf + offset, len); 392 1.3.2.2 bouyer } 393 1.3.2.2 bouyer 394 1.3.2.2 bouyer if (ops & BUS_DMASYNC_POSTREAD) { 395 1.3.2.2 bouyer /* 396 1.3.2.2 bouyer * Copy the SRAM buffer to the caller's buffer. 397 1.3.2.2 bouyer */ 398 1.3.2.2 bouyer bus_space_read_region_1(sc->sc_memt, 399 1.3.2.2 bouyer sc->sc_dma_memh, 400 1.3.2.2 bouyer dmaoff + offset, 401 1.3.2.2 bouyer (u_int8_t *)gmap->gd_origbuf + offset, len); 402 1.3.2.2 bouyer } 403 1.3.2.2 bouyer 404 1.3.2.2 bouyer /* 405 1.3.2.2 bouyer * Nothing to do for post-write. 406 1.3.2.2 bouyer */ 407 1.3.2.2 bouyer break; 408 1.3.2.2 bouyer 409 1.3.2.2 bouyer case GAPS_DMA_BUFTYPE_MBUF: 410 1.3.2.2 bouyer { 411 1.3.2.2 bouyer struct mbuf *m, *m0 = gmap->gd_origbuf; 412 1.3.2.2 bouyer bus_size_t minlen, moff; 413 1.3.2.2 bouyer 414 1.3.2.2 bouyer /* 415 1.3.2.2 bouyer * Nothing to do for pre-read. 416 1.3.2.2 bouyer */ 417 1.3.2.2 bouyer 418 1.3.2.2 bouyer if (ops & BUS_DMASYNC_PREWRITE) { 419 1.3.2.2 bouyer /* 420 1.3.2.2 bouyer * Copy the caller's buffer into the SRAM buffer. 421 1.3.2.2 bouyer */ 422 1.3.2.2 bouyer for (moff = offset, m = m0; m != NULL && len != 0; 423 1.3.2.2 bouyer m = m->m_next) { 424 1.3.2.2 bouyer /* Find the beginning mbuf. */ 425 1.3.2.2 bouyer if (moff >= m->m_len) { 426 1.3.2.2 bouyer moff -= m->m_len; 427 1.3.2.2 bouyer continue; 428 1.3.2.2 bouyer } 429 1.3.2.2 bouyer 430 1.3.2.2 bouyer /* 431 1.3.2.2 bouyer * Now at the first mbuf to sync; nail 432 1.3.2.2 bouyer * each one until we have exhausted the 433 1.3.2.2 bouyer * length. 434 1.3.2.2 bouyer */ 435 1.3.2.2 bouyer minlen = len < m->m_len - moff ? 436 1.3.2.2 bouyer len : m->m_len - moff; 437 1.3.2.2 bouyer 438 1.3.2.2 bouyer bus_space_write_region_1(sc->sc_memt, 439 1.3.2.2 bouyer sc->sc_dma_memh, dmaoff + offset, 440 1.3.2.2 bouyer mtod(m, u_int8_t *) + moff, minlen); 441 1.3.2.2 bouyer 442 1.3.2.2 bouyer moff = 0; 443 1.3.2.2 bouyer len -= minlen; 444 1.3.2.2 bouyer offset += minlen; 445 1.3.2.2 bouyer } 446 1.3.2.2 bouyer } 447 1.3.2.2 bouyer 448 1.3.2.2 bouyer if (ops & BUS_DMASYNC_POSTREAD) { 449 1.3.2.2 bouyer /* 450 1.3.2.2 bouyer * Copy the SRAM buffer into the caller's buffer. 451 1.3.2.2 bouyer */ 452 1.3.2.2 bouyer for (moff = offset, m = m0; m != NULL && len != 0; 453 1.3.2.2 bouyer m = m->m_next) { 454 1.3.2.2 bouyer /* Find the beginning mbuf. */ 455 1.3.2.2 bouyer if (moff >= m->m_len) { 456 1.3.2.2 bouyer moff -= m->m_len; 457 1.3.2.2 bouyer continue; 458 1.3.2.2 bouyer } 459 1.3.2.2 bouyer 460 1.3.2.2 bouyer /* 461 1.3.2.2 bouyer * Now at the first mbuf to sync; nail 462 1.3.2.2 bouyer * each one until we have exhausted the 463 1.3.2.2 bouyer * length. 464 1.3.2.2 bouyer */ 465 1.3.2.2 bouyer minlen = len < m->m_len - moff ? 466 1.3.2.2 bouyer len : m->m_len - moff; 467 1.3.2.2 bouyer 468 1.3.2.2 bouyer bus_space_read_region_1(sc->sc_memt, 469 1.3.2.2 bouyer sc->sc_dma_memh, dmaoff + offset, 470 1.3.2.2 bouyer mtod(m, u_int8_t *) + moff, minlen); 471 1.3.2.2 bouyer 472 1.3.2.2 bouyer moff = 0; 473 1.3.2.2 bouyer len -= minlen; 474 1.3.2.2 bouyer offset += minlen; 475 1.3.2.2 bouyer } 476 1.3.2.2 bouyer } 477 1.3.2.2 bouyer 478 1.3.2.2 bouyer /* 479 1.3.2.2 bouyer * Nothing to do for post-write. 480 1.3.2.2 bouyer */ 481 1.3.2.2 bouyer break; 482 1.3.2.2 bouyer } 483 1.3.2.2 bouyer 484 1.3.2.2 bouyer default: 485 1.3.2.2 bouyer printf("unknown buffer type %d\n", gmap->gd_buftype); 486 1.3.2.2 bouyer panic("gaps_dmamap_sync"); 487 1.3.2.2 bouyer } 488 1.3.2.2 bouyer } 489 1.3.2.2 bouyer 490 1.3.2.2 bouyer int 491 1.3.2.2 bouyer gaps_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment, 492 1.3.2.2 bouyer bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs, 493 1.3.2.2 bouyer int flags) 494 1.3.2.2 bouyer { 495 1.3.2.2 bouyer extern paddr_t avail_start, avail_end; /* from pmap.c */ 496 1.3.2.2 bouyer 497 1.3.2.2 bouyer struct pglist mlist; 498 1.3.2.2 bouyer paddr_t curaddr, lastaddr; 499 1.3.2.2 bouyer vm_page_t m; 500 1.3.2.2 bouyer int curseg, error; 501 1.3.2.2 bouyer 502 1.3.2.2 bouyer /* Always round the size. */ 503 1.3.2.2 bouyer size = round_page(size); 504 1.3.2.2 bouyer 505 1.3.2.2 bouyer /* 506 1.3.2.2 bouyer * Allocate the pages from the VM system. 507 1.3.2.2 bouyer */ 508 1.3.2.2 bouyer TAILQ_INIT(&mlist); 509 1.3.2.2 bouyer error = uvm_pglistalloc(size, avail_start, avail_end - PAGE_SIZE, 510 1.3.2.2 bouyer alignment, boundary, &mlist, nsegs, (flags & BUS_DMA_NOWAIT) == 0); 511 1.3.2.2 bouyer if (error) 512 1.3.2.2 bouyer return (error); 513 1.3.2.2 bouyer 514 1.3.2.2 bouyer /* 515 1.3.2.2 bouyer * Compute the location, size, and number of segments actually 516 1.3.2.2 bouyer * returned by the VM code. 517 1.3.2.2 bouyer */ 518 1.3.2.2 bouyer m = mlist.tqh_first; 519 1.3.2.2 bouyer curseg = 0; 520 1.3.2.2 bouyer lastaddr = segs[curseg].ds_addr = VM_PAGE_TO_PHYS(m); 521 1.3.2.2 bouyer segs[curseg].ds_len = PAGE_SIZE; 522 1.3.2.2 bouyer m = TAILQ_NEXT(m, pageq); 523 1.3.2.2 bouyer 524 1.3.2.2 bouyer for (; m != NULL; m = TAILQ_NEXT(m, pageq)) { 525 1.3.2.2 bouyer curaddr = VM_PAGE_TO_PHYS(m); 526 1.3.2.2 bouyer if (curaddr == (lastaddr + PAGE_SIZE)) 527 1.3.2.2 bouyer segs[curseg].ds_len += PAGE_SIZE; 528 1.3.2.2 bouyer else { 529 1.3.2.2 bouyer curseg++; 530 1.3.2.2 bouyer segs[curseg].ds_addr = curaddr; 531 1.3.2.2 bouyer segs[curseg].ds_len = PAGE_SIZE; 532 1.3.2.2 bouyer } 533 1.3.2.2 bouyer lastaddr = curaddr; 534 1.3.2.2 bouyer } 535 1.3.2.2 bouyer 536 1.3.2.2 bouyer *rsegs = curseg + 1; 537 1.3.2.2 bouyer 538 1.3.2.2 bouyer return (0); 539 1.3.2.2 bouyer } 540 1.3.2.2 bouyer 541 1.3.2.2 bouyer void 542 1.3.2.2 bouyer gaps_dmamem_free(bus_dma_tag_t t, bus_dma_segment_t *segs, int nsegs) 543 1.3.2.2 bouyer { 544 1.3.2.2 bouyer struct pglist mlist; 545 1.3.2.2 bouyer vm_page_t m; 546 1.3.2.2 bouyer bus_addr_t addr; 547 1.3.2.2 bouyer int curseg; 548 1.3.2.2 bouyer 549 1.3.2.2 bouyer /* 550 1.3.2.2 bouyer * Build a list of pages to free back to the VM system. 551 1.3.2.2 bouyer */ 552 1.3.2.2 bouyer TAILQ_INIT(&mlist); 553 1.3.2.2 bouyer for (curseg = 0; curseg < nsegs; curseg++) { 554 1.3.2.2 bouyer for (addr = segs[curseg].ds_addr; 555 1.3.2.2 bouyer addr < segs[curseg].ds_addr + segs[curseg].ds_len; 556 1.3.2.2 bouyer addr += PAGE_SIZE) { 557 1.3.2.2 bouyer m = PHYS_TO_VM_PAGE(addr); 558 1.3.2.2 bouyer TAILQ_INSERT_TAIL(&mlist, m, pageq); 559 1.3.2.2 bouyer } 560 1.3.2.2 bouyer } 561 1.3.2.2 bouyer 562 1.3.2.2 bouyer uvm_pglistfree(&mlist); 563 1.3.2.2 bouyer } 564 1.3.2.2 bouyer 565 1.3.2.2 bouyer int 566 1.3.2.2 bouyer gaps_dmamem_map(bus_dma_tag_t t, bus_dma_segment_t *segs, int nsegs, 567 1.3.2.2 bouyer size_t size, caddr_t *kvap, int flags) 568 1.3.2.2 bouyer { 569 1.3.2.2 bouyer vaddr_t va; 570 1.3.2.2 bouyer bus_addr_t addr; 571 1.3.2.2 bouyer int curseg; 572 1.3.2.2 bouyer 573 1.3.2.2 bouyer /* 574 1.3.2.2 bouyer * If we're only mapping 1 segment, use P2SEG, to avoid 575 1.3.2.2 bouyer * TLB thrashing. 576 1.3.2.2 bouyer */ 577 1.3.2.2 bouyer if (nsegs == 1) { 578 1.3.2.2 bouyer *kvap = (caddr_t) SH3_PHYS_TO_P2SEG(segs[0].ds_addr); 579 1.3.2.2 bouyer return (0); 580 1.3.2.2 bouyer } 581 1.3.2.2 bouyer 582 1.3.2.2 bouyer size = round_page(size); 583 1.3.2.2 bouyer 584 1.3.2.2 bouyer va = uvm_km_valloc(kernel_map, size); 585 1.3.2.2 bouyer 586 1.3.2.2 bouyer if (va == 0) 587 1.3.2.2 bouyer return (ENOMEM); 588 1.3.2.2 bouyer 589 1.3.2.2 bouyer *kvap = (caddr_t) va; 590 1.3.2.2 bouyer 591 1.3.2.2 bouyer for (curseg = 0; curseg < nsegs; curseg++) { 592 1.3.2.2 bouyer for (addr = segs[curseg].ds_addr; 593 1.3.2.2 bouyer addr < segs[curseg].ds_addr + segs[curseg].ds_len; 594 1.3.2.2 bouyer addr += PAGE_SIZE, va += PAGE_SIZE, size -= PAGE_SIZE) { 595 1.3.2.2 bouyer if (size == 0) 596 1.3.2.2 bouyer panic("gaps_dmamem_map: size botch"); 597 1.3.2.2 bouyer pmap_kenter_pa(va, addr, 598 1.3.2.2 bouyer VM_PROT_READ | VM_PROT_WRITE); 599 1.3.2.2 bouyer } 600 1.3.2.2 bouyer } 601 1.3.2.2 bouyer 602 1.3.2.2 bouyer return (0); 603 1.3.2.2 bouyer } 604 1.3.2.2 bouyer 605 1.3.2.2 bouyer void 606 1.3.2.2 bouyer gaps_dmamem_unmap(bus_dma_tag_t t, caddr_t kva, size_t size) 607 1.3.2.2 bouyer { 608 1.3.2.2 bouyer 609 1.3.2.2 bouyer #ifdef DIAGNOSTIC 610 1.3.2.2 bouyer if ((u_long) kva & PAGE_MASK) 611 1.3.2.2 bouyer panic("gaps_dmamem_unmap"); 612 1.3.2.2 bouyer #endif 613 1.3.2.2 bouyer 614 1.3.2.2 bouyer /* 615 1.3.2.2 bouyer * Nothing to do if we mapped it with P2SEG. 616 1.3.2.2 bouyer */ 617 1.3.2.2 bouyer if (kva >= (caddr_t) SH3_P2SEG_BASE && 618 1.3.2.2 bouyer kva <= (caddr_t) SH3_P2SEG_END) 619 1.3.2.2 bouyer return; 620 1.3.2.2 bouyer 621 1.3.2.2 bouyer size = round_page(size); 622 1.3.2.2 bouyer pmap_kremove((vaddr_t) kva, size); 623 1.3.2.2 bouyer uvm_km_free(kernel_map, (vaddr_t) kva, size); 624 1.3.2.2 bouyer } 625 1.3.2.2 bouyer 626 1.3.2.2 bouyer paddr_t 627 1.3.2.2 bouyer gaps_dmamem_mmap(bus_dma_tag_t t, bus_dma_segment_t *segs, int nsegs, 628 1.3.2.2 bouyer off_t off, int prot, int flags) 629 1.3.2.2 bouyer { 630 1.3.2.2 bouyer 631 1.3.2.2 bouyer /* Not implemented. */ 632 1.3.2.2 bouyer return (-1); 633 1.3.2.2 bouyer } 634
Indexes created Tue Oct 21 12:09:54 GMT 2025