intio.c revision 1.32
1 /* $NetBSD: intio.c,v 1.32 2007/05/12 06:31:18 isaki Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the NetBSD 18 * Foundation, Inc. and its contributors. 19 * 4. Neither the name of The NetBSD Foundation nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* 37 * NetBSD/x68k internal I/O virtual bus. 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: intio.c,v 1.32 2007/05/12 06:31:18 isaki Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/device.h> 46 #include <sys/malloc.h> 47 #include <sys/mbuf.h> 48 #include <sys/extent.h> 49 #include <uvm/uvm_extern.h> 50 51 #include <machine/bus.h> 52 #include <machine/cpu.h> 53 #include <machine/frame.h> 54 55 #include <arch/x68k/dev/intiovar.h> 56 #include <arch/x68k/dev/mfp.h> 57 58 59 /* 60 * bus_space(9) interface 61 */ 62 static int intio_bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, bus_space_handle_t *); 63 static void intio_bus_space_unmap(bus_space_tag_t, bus_space_handle_t, bus_size_t); 64 static int intio_bus_space_subregion(bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_size_t, bus_space_handle_t *); 65 66 static struct x68k_bus_space intio_bus = { 67 #if 0 68 X68K_INTIO_BUS, 69 #endif 70 intio_bus_space_map, intio_bus_space_unmap, intio_bus_space_subregion, 71 x68k_bus_space_alloc, x68k_bus_space_free, 72 #if 0 73 x68k_bus_space_barrier, 74 #endif 75 76 0 77 }; 78 79 /* 80 * bus_dma(9) interface 81 */ 82 #define INTIO_DMA_BOUNCE_THRESHOLD (16 * 1024 * 1024) 83 int _intio_bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, 84 bus_size_t, bus_size_t, int, bus_dmamap_t *); 85 void _intio_bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); 86 int _intio_bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, 87 bus_size_t, struct proc *, int); 88 int _intio_bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, 89 struct mbuf *, int); 90 int _intio_bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, 91 struct uio *, int); 92 int _intio_bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, 93 bus_dma_segment_t *, int, bus_size_t, int); 94 void _intio_bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); 95 void _intio_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, 96 bus_addr_t, bus_size_t, int); 97 98 int _intio_bus_dmamem_alloc(bus_dma_tag_t, bus_size_t, bus_size_t, 99 bus_size_t, bus_dma_segment_t *, int, int *, int); 100 101 int _intio_dma_alloc_bouncebuf(bus_dma_tag_t, bus_dmamap_t, 102 bus_size_t, int); 103 void _intio_dma_free_bouncebuf(bus_dma_tag_t, bus_dmamap_t); 104 105 struct x68k_bus_dma intio_bus_dma = { 106 INTIO_DMA_BOUNCE_THRESHOLD, 107 _intio_bus_dmamap_create, 108 _intio_bus_dmamap_destroy, 109 _intio_bus_dmamap_load, 110 _intio_bus_dmamap_load_mbuf, 111 _intio_bus_dmamap_load_uio, 112 _intio_bus_dmamap_load_raw, 113 _intio_bus_dmamap_unload, 114 _intio_bus_dmamap_sync, 115 _intio_bus_dmamem_alloc, 116 x68k_bus_dmamem_free, 117 x68k_bus_dmamem_map, 118 x68k_bus_dmamem_unmap, 119 x68k_bus_dmamem_mmap, 120 }; 121 122 /* 123 * autoconf stuff 124 */ 125 static int intio_match(struct device *, struct cfdata *, void *); 126 static void intio_attach(struct device *, struct device *, void *); 127 static int intio_search(struct device *, struct cfdata *cf, 128 const int *, void *); 129 static int intio_print(void *, const char *); 130 static void intio_alloc_system_ports(struct intio_softc*); 131 132 CFATTACH_DECL(intio, sizeof(struct intio_softc), 133 intio_match, intio_attach, NULL, NULL); 134 135 extern struct cfdriver intio_cd; 136 137 static int intio_attached; 138 139 static struct intio_interrupt_vector { 140 intio_intr_handler_t iiv_handler; 141 void *iiv_arg; 142 int iiv_intrcntoff; 143 } iiv[256] = {{0,},}; 144 145 /* used in console initialization */ 146 extern int x68k_realconfig; 147 int x68k_config_found(struct cfdata *, struct device *, void *, cfprint_t); 148 static struct cfdata *cfdata_intiobus = NULL; 149 150 /* other static functions */ 151 static int scan_intrnames(const char *); 152 #ifdef DEBUG 153 int intio_debug = 0; 154 #endif 155 156 static int 157 intio_match(struct device *parent, struct cfdata *cf, void *aux) 158 { 159 160 if (strcmp(aux, intio_cd.cd_name) != 0) 161 return (0); 162 if (intio_attached) 163 return (0); 164 if (x68k_realconfig == 0) 165 cfdata_intiobus = cf; /* XXX */ 166 167 return (1); 168 } 169 170 171 /* used in console initialization: configure only MFP */ 172 static struct intio_attach_args initial_ia = { 173 &intio_bus, 174 0/*XXX*/, 175 176 "mfp", /* ia_name */ 177 MFP_ADDR, /* ia_addr */ 178 0x30, /* ia_size */ 179 MFP_INTR, /* ia_intr */ 180 -1 /* ia_dma */ 181 -1, /* ia_dmaintr */ 182 }; 183 184 static void 185 intio_attach(struct device *parent, struct device *self, void *aux) 186 { 187 struct intio_softc *sc = (struct intio_softc *)self; 188 struct intio_attach_args ia; 189 190 if (self == NULL) { 191 /* console only init */ 192 x68k_config_found(cfdata_intiobus, NULL, &initial_ia, NULL); 193 return; 194 } 195 196 intio_attached = 1; 197 198 printf(" mapped at %8p\n", intiobase); 199 200 sc->sc_map = extent_create("intiomap", 201 PHYS_INTIODEV, 202 PHYS_INTIODEV + 0x400000, 203 M_DEVBUF, NULL, 0, EX_NOWAIT); 204 intio_alloc_system_ports(sc); 205 206 sc->sc_bst = &intio_bus; 207 sc->sc_bst->x68k_bus_device = self; 208 sc->sc_dmat = &intio_bus_dma; 209 sc->sc_dmac = 0; 210 211 memset(iiv, 0, sizeof(struct intio_interrupt_vector) * 256); 212 213 ia.ia_bst = sc->sc_bst; 214 ia.ia_dmat = sc->sc_dmat; 215 216 config_search_ia(intio_search, self, "intio", &ia); 217 } 218 219 static int 220 intio_search(struct device *parent, struct cfdata *cf, 221 const int *ldesc, void *aux) 222 { 223 struct intio_attach_args *ia = aux; 224 struct intio_softc *sc = (struct intio_softc *)parent; 225 226 ia->ia_bst = sc->sc_bst; 227 ia->ia_dmat = sc->sc_dmat; 228 ia->ia_name = cf->cf_name; 229 ia->ia_addr = cf->cf_addr; 230 ia->ia_intr = cf->cf_intr; 231 ia->ia_dma = cf->cf_dma; 232 ia->ia_dmaintr = cf->cf_dmaintr; 233 234 if (config_match(parent, cf, ia) > 0) 235 config_attach(parent, cf, ia, intio_print); 236 237 return (0); 238 } 239 240 static int 241 intio_print(void *aux, const char *name) 242 { 243 struct intio_attach_args *ia = aux; 244 245 /* if (ia->ia_addr > 0) */ 246 aprint_normal(" addr 0x%06x", ia->ia_addr); 247 if (ia->ia_intr > 0) 248 aprint_normal(" intr 0x%02x", ia->ia_intr); 249 if (ia->ia_dma >= 0) { 250 aprint_normal(" using DMA ch%d", ia->ia_dma); 251 if (ia->ia_dmaintr > 0) 252 aprint_normal(" intr 0x%02x and 0x%02x", 253 ia->ia_dmaintr, ia->ia_dmaintr+1); 254 } 255 256 return (QUIET); 257 } 258 259 /* 260 * intio memory map manager 261 */ 262 263 int 264 intio_map_allocate_region(struct device *parent, struct intio_attach_args *ia, 265 enum intio_map_flag flag) 266 { 267 struct intio_softc *sc = (struct intio_softc *)parent; 268 struct extent *map = sc->sc_map; 269 int r; 270 271 r = extent_alloc_region(map, ia->ia_addr, ia->ia_size, 0); 272 #ifdef DEBUG 273 if (intio_debug) 274 extent_print(map); 275 #endif 276 if (r == 0) { 277 if (flag != INTIO_MAP_ALLOCATE) 278 extent_free(map, ia->ia_addr, ia->ia_size, 0); 279 return 0; 280 } 281 282 return -1; 283 } 284 285 int 286 intio_map_free_region(struct device *parent, struct intio_attach_args *ia) 287 { 288 struct intio_softc *sc = (struct intio_softc*) parent; 289 struct extent *map = sc->sc_map; 290 291 extent_free(map, ia->ia_addr, ia->ia_size, 0); 292 #ifdef DEBUG 293 if (intio_debug) 294 extent_print(map); 295 #endif 296 return 0; 297 } 298 299 void 300 intio_alloc_system_ports(struct intio_softc *sc) 301 { 302 extent_alloc_region(sc->sc_map, INTIO_SYSPORT, 16, 0); 303 extent_alloc_region(sc->sc_map, INTIO_SICILIAN, 0x2000, 0); 304 } 305 306 307 /* 308 * intio bus space stuff. 309 */ 310 static int 311 intio_bus_space_map(bus_space_tag_t t, bus_addr_t bpa, bus_size_t size, 312 int flags, bus_space_handle_t *bshp) 313 { 314 /* 315 * Intio bus is mapped permanently. 316 */ 317 *bshp = (bus_space_handle_t) 318 ((u_int) bpa - PHYS_INTIODEV + intiobase); 319 /* 320 * Some devices are mapped on odd or even addresses only. 321 */ 322 if ((flags & BUS_SPACE_MAP_SHIFTED_MASK) == BUS_SPACE_MAP_SHIFTED_ODD) 323 *bshp += 0x80000001; 324 if ((flags & BUS_SPACE_MAP_SHIFTED_MASK) == BUS_SPACE_MAP_SHIFTED_EVEN) 325 *bshp += 0x80000000; 326 327 return (0); 328 } 329 330 static void 331 intio_bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh, 332 bus_size_t size) 333 { 334 return; 335 } 336 337 static int 338 intio_bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh, 339 bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) 340 { 341 342 *nbshp = bsh + offset; 343 return (0); 344 } 345 346 347 /* 348 * interrupt handler 349 */ 350 int 351 intio_intr_establish(int vector, const char *name, intio_intr_handler_t handler, 352 void *arg) 353 { 354 if (vector < 16) 355 panic("Invalid interrupt vector"); 356 if (iiv[vector].iiv_handler) 357 return EBUSY; 358 iiv[vector].iiv_handler = handler; 359 iiv[vector].iiv_arg = arg; 360 iiv[vector].iiv_intrcntoff = scan_intrnames(name); 361 362 return 0; 363 } 364 365 static int 366 scan_intrnames(const char *name) 367 { 368 extern char intrnames[]; 369 extern char eintrnames[]; 370 int r = 0; 371 char *p = &intrnames[0]; 372 373 for (;;) { 374 if (*p == 0) { /* new intr */ 375 if (p + strlen(name) >= eintrnames) 376 panic("Interrupt statics buffer overrun."); 377 strcpy(p, name); 378 break; 379 } 380 if (strcmp(p, name) == 0) 381 break; 382 r++; 383 while (*p++ != 0); 384 } 385 386 return r; 387 } 388 389 int 390 intio_intr_disestablish(int vector, void *arg) 391 { 392 if (iiv[vector].iiv_handler == 0 || iiv[vector].iiv_arg != arg) 393 return EINVAL; 394 iiv[vector].iiv_handler = 0; 395 iiv[vector].iiv_arg = 0; 396 397 return 0; 398 } 399 400 int 401 intio_intr(struct frame *frame) 402 { 403 int vector = frame->f_vector / 4; 404 extern int intrcnt[]; 405 406 #if 0 /* this is not correct now */ 407 /* CAUTION: HERE WE ARE IN SPLHIGH() */ 408 /* LOWER TO APPROPRIATE IPL AT VERY FIRST IN THE HANDLER!! */ 409 #endif 410 if (iiv[vector].iiv_handler == 0) { 411 printf("Stray interrupt: %d type %x, pc %x\n", 412 vector, frame->f_format, frame->f_pc); 413 return 0; 414 } 415 416 intrcnt[iiv[vector].iiv_intrcntoff]++; 417 418 return (*(iiv[vector].iiv_handler))(iiv[vector].iiv_arg); 419 } 420 421 /* 422 * Intio I/O controller interrupt 423 */ 424 static u_int8_t intio_ivec = 0; 425 426 void 427 intio_set_ivec(int vec) 428 { 429 vec &= 0xfc; 430 431 if (intio_ivec && intio_ivec != (vec & 0xfc)) 432 panic("Wrong interrupt vector for Sicilian."); 433 434 intio_ivec = vec; 435 intio_set_sicilian_ivec(vec); 436 } 437 438 439 /* 440 * intio bus DMA stuff. stolen from arch/i386/isa/isa_machdep.c 441 */ 442 443 /* 444 * Create an INTIO DMA map. 445 */ 446 int 447 _intio_bus_dmamap_create(bus_dma_tag_t t, bus_size_t size, int nsegments, 448 bus_size_t maxsegsz, bus_size_t boundary, int flags, bus_dmamap_t *dmamp) 449 { 450 struct intio_dma_cookie *cookie; 451 bus_dmamap_t map; 452 int error, cookieflags; 453 void *cookiestore; 454 size_t cookiesize; 455 extern paddr_t avail_end; 456 457 /* Call common function to create the basic map. */ 458 error = x68k_bus_dmamap_create(t, size, nsegments, maxsegsz, boundary, 459 flags, dmamp); 460 if (error) 461 return (error); 462 463 map = *dmamp; 464 map->x68k_dm_cookie = NULL; 465 466 cookiesize = sizeof(struct intio_dma_cookie); 467 468 /* 469 * INTIO only has 24-bits of address space. This means 470 * we can't DMA to pages over 16M. In order to DMA to 471 * arbitrary buffers, we use "bounce buffers" - pages 472 * in memory below the 16M boundary. On DMA reads, 473 * DMA happens to the bounce buffers, and is copied into 474 * the caller's buffer. On writes, data is copied into 475 * but bounce buffer, and the DMA happens from those 476 * pages. To software using the DMA mapping interface, 477 * this looks simply like a data cache. 478 * 479 * If we have more than 16M of RAM in the system, we may 480 * need bounce buffers. We check and remember that here. 481 * 482 * ...or, there is an opposite case. The most segments 483 * a transfer will require is (maxxfer / PAGE_SIZE) + 1. If 484 * the caller can't handle that many segments (e.g. the 485 * DMAC), we may have to bounce it as well. 486 */ 487 if (avail_end <= t->_bounce_thresh) 488 /* Bouncing not necessary due to memory size. */ 489 map->x68k_dm_bounce_thresh = 0; 490 cookieflags = 0; 491 if (map->x68k_dm_bounce_thresh != 0 || 492 ((map->x68k_dm_size / PAGE_SIZE) + 1) > map->x68k_dm_segcnt) { 493 cookieflags |= ID_MIGHT_NEED_BOUNCE; 494 cookiesize += (sizeof(bus_dma_segment_t) * map->x68k_dm_segcnt); 495 } 496 497 /* 498 * Allocate our cookie. 499 */ 500 if ((cookiestore = malloc(cookiesize, M_DMAMAP, 501 (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK)) == NULL) { 502 error = ENOMEM; 503 goto out; 504 } 505 memset(cookiestore, 0, cookiesize); 506 cookie = (struct intio_dma_cookie *)cookiestore; 507 cookie->id_flags = cookieflags; 508 map->x68k_dm_cookie = cookie; 509 510 if (cookieflags & ID_MIGHT_NEED_BOUNCE) { 511 /* 512 * Allocate the bounce pages now if the caller 513 * wishes us to do so. 514 */ 515 if ((flags & BUS_DMA_ALLOCNOW) == 0) 516 goto out; 517 518 error = _intio_dma_alloc_bouncebuf(t, map, size, flags); 519 } 520 521 out: 522 if (error) { 523 if (map->x68k_dm_cookie != NULL) 524 free(map->x68k_dm_cookie, M_DMAMAP); 525 x68k_bus_dmamap_destroy(t, map); 526 } 527 return (error); 528 } 529 530 /* 531 * Destroy an INTIO DMA map. 532 */ 533 void 534 _intio_bus_dmamap_destroy(bus_dma_tag_t t, bus_dmamap_t map) 535 { 536 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 537 538 /* 539 * Free any bounce pages this map might hold. 540 */ 541 if (cookie->id_flags & ID_HAS_BOUNCE) 542 _intio_dma_free_bouncebuf(t, map); 543 544 free(cookie, M_DMAMAP); 545 x68k_bus_dmamap_destroy(t, map); 546 } 547 548 /* 549 * Load an INTIO DMA map with a linear buffer. 550 */ 551 int 552 _intio_bus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf, 553 bus_size_t buflen, struct proc *p, int flags) 554 { 555 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 556 int error; 557 558 /* 559 * Make sure that on error condition we return "no valid mappings." 560 */ 561 map->dm_mapsize = 0; 562 map->dm_nsegs = 0; 563 564 /* 565 * Try to load the map the normal way. If this errors out, 566 * and we can bounce, we will. 567 */ 568 error = x68k_bus_dmamap_load(t, map, buf, buflen, p, flags); 569 if (error == 0 || 570 (error != 0 && (cookie->id_flags & ID_MIGHT_NEED_BOUNCE) == 0)) 571 return (error); 572 573 /* 574 * Allocate bounce pages, if necessary. 575 */ 576 if ((cookie->id_flags & ID_HAS_BOUNCE) == 0) { 577 error = _intio_dma_alloc_bouncebuf(t, map, buflen, flags); 578 if (error) 579 return (error); 580 } 581 582 /* 583 * Cache a pointer to the caller's buffer and load the DMA map 584 * with the bounce buffer. 585 */ 586 cookie->id_origbuf = buf; 587 cookie->id_origbuflen = buflen; 588 cookie->id_buftype = ID_BUFTYPE_LINEAR; 589 error = x68k_bus_dmamap_load(t, map, cookie->id_bouncebuf, buflen, 590 p, flags); 591 if (error) { 592 /* 593 * Free the bounce pages, unless our resources 594 * are reserved for our exclusive use. 595 */ 596 if ((map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0) 597 _intio_dma_free_bouncebuf(t, map); 598 return (error); 599 } 600 601 /* ...so _intio_bus_dmamap_sync() knows we're bouncing */ 602 cookie->id_flags |= ID_IS_BOUNCING; 603 return (0); 604 } 605 606 /* 607 * Like _intio_bus_dmamap_load(), but for mbufs. 608 */ 609 int 610 _intio_bus_dmamap_load_mbuf(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m0, 611 int flags) 612 { 613 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 614 int error; 615 616 /* 617 * Make sure on error condition we return "no valid mappings." 618 */ 619 map->dm_mapsize = 0; 620 map->dm_nsegs = 0; 621 622 #ifdef DIAGNOSTIC 623 if ((m0->m_flags & M_PKTHDR) == 0) 624 panic("_intio_bus_dmamap_load_mbuf: no packet header"); 625 #endif 626 627 if (m0->m_pkthdr.len > map->x68k_dm_size) 628 return (EINVAL); 629 630 /* 631 * Try to load the map the normal way. If this errors out, 632 * and we can bounce, we will. 633 */ 634 error = x68k_bus_dmamap_load_mbuf(t, map, m0, flags); 635 if (error == 0 || 636 (error != 0 && (cookie->id_flags & ID_MIGHT_NEED_BOUNCE) == 0)) 637 return (error); 638 639 /* 640 * Allocate bounce pages, if necessary. 641 */ 642 if ((cookie->id_flags & ID_HAS_BOUNCE) == 0) { 643 error = _intio_dma_alloc_bouncebuf(t, map, m0->m_pkthdr.len, 644 flags); 645 if (error) 646 return (error); 647 } 648 649 /* 650 * Cache a pointer to the caller's buffer and load the DMA map 651 * with the bounce buffer. 652 */ 653 cookie->id_origbuf = m0; 654 cookie->id_origbuflen = m0->m_pkthdr.len; /* not really used */ 655 cookie->id_buftype = ID_BUFTYPE_MBUF; 656 error = x68k_bus_dmamap_load(t, map, cookie->id_bouncebuf, 657 m0->m_pkthdr.len, NULL, flags); 658 if (error) { 659 /* 660 * Free the bounce pages, unless our resources 661 * are reserved for our exclusive use. 662 */ 663 if ((map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0) 664 _intio_dma_free_bouncebuf(t, map); 665 return (error); 666 } 667 668 /* ...so _intio_bus_dmamap_sync() knows we're bouncing */ 669 cookie->id_flags |= ID_IS_BOUNCING; 670 return (0); 671 } 672 673 /* 674 * Like _intio_bus_dmamap_load(), but for uios. 675 */ 676 int 677 _intio_bus_dmamap_load_uio(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio, 678 int flags) 679 { 680 panic("_intio_bus_dmamap_load_uio: not implemented"); 681 } 682 683 /* 684 * Like _intio_bus_dmamap_load(), but for raw memory allocated with 685 * bus_dmamem_alloc(). 686 */ 687 int 688 _intio_bus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map, 689 bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags) 690 { 691 692 panic("_intio_bus_dmamap_load_raw: not implemented"); 693 } 694 695 /* 696 * Unload an INTIO DMA map. 697 */ 698 void 699 _intio_bus_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map) 700 { 701 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 702 703 /* 704 * If we have bounce pages, free them, unless they're 705 * reserved for our exclusive use. 706 */ 707 if ((cookie->id_flags & ID_HAS_BOUNCE) && 708 (map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0) 709 _intio_dma_free_bouncebuf(t, map); 710 711 cookie->id_flags &= ~ID_IS_BOUNCING; 712 cookie->id_buftype = ID_BUFTYPE_INVALID; 713 714 /* 715 * Do the generic bits of the unload. 716 */ 717 x68k_bus_dmamap_unload(t, map); 718 } 719 720 /* 721 * Synchronize an INTIO DMA map. 722 */ 723 void 724 _intio_bus_dmamap_sync(bus_dma_tag_t t, bus_dmamap_t map, bus_addr_t offset, 725 bus_size_t len, int ops) 726 { 727 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 728 729 /* 730 * Mixing PRE and POST operations is not allowed. 731 */ 732 if ((ops & (BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE)) != 0 && 733 (ops & (BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE)) != 0) 734 panic("_intio_bus_dmamap_sync: mix PRE and POST"); 735 736 #ifdef DIAGNOSTIC 737 if ((ops & (BUS_DMASYNC_PREWRITE|BUS_DMASYNC_POSTREAD)) != 0) { 738 if (offset >= map->dm_mapsize) 739 panic("_intio_bus_dmamap_sync: bad offset"); 740 if (len == 0 || (offset + len) > map->dm_mapsize) 741 panic("_intio_bus_dmamap_sync: bad length"); 742 } 743 #endif 744 745 /* 746 * If we're not bouncing, just return; nothing to do. 747 */ 748 if ((cookie->id_flags & ID_IS_BOUNCING) == 0) 749 return; 750 751 switch (cookie->id_buftype) { 752 case ID_BUFTYPE_LINEAR: 753 /* 754 * Nothing to do for pre-read. 755 */ 756 757 if (ops & BUS_DMASYNC_PREWRITE) { 758 /* 759 * Copy the caller's buffer to the bounce buffer. 760 */ 761 memcpy((char *)cookie->id_bouncebuf + offset, 762 (char *)cookie->id_origbuf + offset, len); 763 } 764 765 if (ops & BUS_DMASYNC_POSTREAD) { 766 /* 767 * Copy the bounce buffer to the caller's buffer. 768 */ 769 memcpy((char *)cookie->id_origbuf + offset, 770 (char *)cookie->id_bouncebuf + offset, len); 771 } 772 773 /* 774 * Nothing to do for post-write. 775 */ 776 break; 777 778 case ID_BUFTYPE_MBUF: 779 { 780 struct mbuf *m, *m0 = cookie->id_origbuf; 781 bus_size_t minlen, moff; 782 783 /* 784 * Nothing to do for pre-read. 785 */ 786 787 if (ops & BUS_DMASYNC_PREWRITE) { 788 /* 789 * Copy the caller's buffer to the bounce buffer. 790 */ 791 m_copydata(m0, offset, len, 792 (char *)cookie->id_bouncebuf + offset); 793 } 794 795 if (ops & BUS_DMASYNC_POSTREAD) { 796 /* 797 * Copy the bounce buffer to the caller's buffer. 798 */ 799 for (moff = offset, m = m0; m != NULL && len != 0; 800 m = m->m_next) { 801 /* Find the beginning mbuf. */ 802 if (moff >= m->m_len) { 803 moff -= m->m_len; 804 continue; 805 } 806 807 /* 808 * Now at the first mbuf to sync; nail 809 * each one until we have exhausted the 810 * length. 811 */ 812 minlen = len < m->m_len - moff ? 813 len : m->m_len - moff; 814 815 memcpy(mtod(m, char *) + moff, 816 (char *)cookie->id_bouncebuf + offset, 817 minlen); 818 819 moff = 0; 820 len -= minlen; 821 offset += minlen; 822 } 823 } 824 825 /* 826 * Nothing to do for post-write. 827 */ 828 break; 829 } 830 831 case ID_BUFTYPE_UIO: 832 panic("_intio_bus_dmamap_sync: ID_BUFTYPE_UIO"); 833 break; 834 835 case ID_BUFTYPE_RAW: 836 panic("_intio_bus_dmamap_sync: ID_BUFTYPE_RAW"); 837 break; 838 839 case ID_BUFTYPE_INVALID: 840 panic("_intio_bus_dmamap_sync: ID_BUFTYPE_INVALID"); 841 break; 842 843 default: 844 printf("unknown buffer type %d\n", cookie->id_buftype); 845 panic("_intio_bus_dmamap_sync"); 846 } 847 } 848 849 /* 850 * Allocate memory safe for INTIO DMA. 851 */ 852 int 853 _intio_bus_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment, 854 bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs, 855 int flags) 856 { 857 paddr_t high; 858 extern paddr_t avail_end; 859 860 if (avail_end > INTIO_DMA_BOUNCE_THRESHOLD) 861 high = trunc_page(INTIO_DMA_BOUNCE_THRESHOLD); 862 else 863 high = trunc_page(avail_end); 864 865 return (x68k_bus_dmamem_alloc_range(t, size, alignment, boundary, 866 segs, nsegs, rsegs, flags, 0, high)); 867 } 868 869 /********************************************************************** 870 * INTIO DMA utility functions 871 **********************************************************************/ 872 873 int 874 _intio_dma_alloc_bouncebuf(bus_dma_tag_t t, bus_dmamap_t map, bus_size_t size, 875 int flags) 876 { 877 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 878 int error = 0; 879 880 cookie->id_bouncebuflen = round_page(size); 881 error = _intio_bus_dmamem_alloc(t, cookie->id_bouncebuflen, 882 PAGE_SIZE, map->x68k_dm_boundary, cookie->id_bouncesegs, 883 map->x68k_dm_segcnt, &cookie->id_nbouncesegs, flags); 884 if (error) 885 goto out; 886 error = x68k_bus_dmamem_map(t, cookie->id_bouncesegs, 887 cookie->id_nbouncesegs, cookie->id_bouncebuflen, 888 (void **)&cookie->id_bouncebuf, flags); 889 890 out: 891 if (error) { 892 x68k_bus_dmamem_free(t, cookie->id_bouncesegs, 893 cookie->id_nbouncesegs); 894 cookie->id_bouncebuflen = 0; 895 cookie->id_nbouncesegs = 0; 896 } else { 897 cookie->id_flags |= ID_HAS_BOUNCE; 898 } 899 900 return (error); 901 } 902 903 void 904 _intio_dma_free_bouncebuf(bus_dma_tag_t t, bus_dmamap_t map) 905 { 906 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 907 908 x68k_bus_dmamem_unmap(t, cookie->id_bouncebuf, 909 cookie->id_bouncebuflen); 910 x68k_bus_dmamem_free(t, cookie->id_bouncesegs, 911 cookie->id_nbouncesegs); 912 cookie->id_bouncebuflen = 0; 913 cookie->id_nbouncesegs = 0; 914 cookie->id_flags &= ~ID_HAS_BOUNCE; 915 } 916
Indexes created Mon Sep 22 13:09:51 GMT 2025