intio.c revision 1.8
1 /* $NetBSD: intio.c,v 1.8 2000/06/29 07:07:53 mrg 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/param.h> 41 #include <sys/systm.h> 42 #include <sys/device.h> 43 #include <sys/malloc.h> 44 #include <sys/mbuf.h> 45 #include <sys/extent.h> 46 #include <uvm/uvm_extern.h> /* XXX needed? */ 47 48 #include <machine/bus.h> 49 #include <machine/cpu.h> 50 #include <machine/frame.h> 51 52 #include <arch/x68k/dev/intiovar.h> 53 #include <arch/x68k/dev/mfp.h> 54 55 56 /* 57 * bus_space(9) interface 58 */ 59 static int intio_bus_space_map __P((bus_space_tag_t, bus_addr_t, bus_size_t, int, bus_space_handle_t *)); 60 static void intio_bus_space_unmap __P((bus_space_tag_t, bus_space_handle_t, bus_size_t)); 61 static int intio_bus_space_subregion __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_size_t, bus_space_handle_t *)); 62 63 static struct x68k_bus_space intio_bus = { 64 #if 0 65 X68K_INTIO_BUS, 66 #endif 67 intio_bus_space_map, intio_bus_space_unmap, intio_bus_space_subregion, 68 x68k_bus_space_alloc, x68k_bus_space_free, 69 #if 0 70 x68k_bus_space_barrier, 71 #endif 72 73 0 74 }; 75 76 /* 77 * bus_dma(9) interface 78 */ 79 #define INTIO_DMA_BOUNCE_THRESHOLD (16 * 1024 * 1024) 80 int _intio_bus_dmamap_create __P((bus_dma_tag_t, bus_size_t, int, 81 bus_size_t, bus_size_t, int, bus_dmamap_t *)); 82 void _intio_bus_dmamap_destroy __P((bus_dma_tag_t, bus_dmamap_t)); 83 int _intio_bus_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *, 84 bus_size_t, struct proc *, int)); 85 int _intio_bus_dmamap_load_mbuf __P((bus_dma_tag_t, bus_dmamap_t, 86 struct mbuf *, int)); 87 int _intio_bus_dmamap_load_uio __P((bus_dma_tag_t, bus_dmamap_t, 88 struct uio *, int)); 89 int _intio_bus_dmamap_load_raw __P((bus_dma_tag_t, bus_dmamap_t, 90 bus_dma_segment_t *, int, bus_size_t, int)); 91 void _intio_bus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t)); 92 void _intio_bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, 93 bus_addr_t, bus_size_t, int)); 94 95 int _intio_bus_dmamem_alloc __P((bus_dma_tag_t, bus_size_t, bus_size_t, 96 bus_size_t, bus_dma_segment_t *, int, int *, int)); 97 98 int _intio_dma_alloc_bouncebuf __P((bus_dma_tag_t, bus_dmamap_t, 99 bus_size_t, int)); 100 void _intio_dma_free_bouncebuf __P((bus_dma_tag_t, bus_dmamap_t)); 101 102 struct x68k_bus_dma intio_bus_dma = { 103 INTIO_DMA_BOUNCE_THRESHOLD, 104 _intio_bus_dmamap_create, 105 _intio_bus_dmamap_destroy, 106 _intio_bus_dmamap_load, 107 _intio_bus_dmamap_load_mbuf, 108 _intio_bus_dmamap_load_uio, 109 _intio_bus_dmamap_load_raw, 110 _intio_bus_dmamap_unload, 111 _intio_bus_dmamap_sync, 112 _intio_bus_dmamem_alloc, 113 x68k_bus_dmamem_free, 114 x68k_bus_dmamem_map, 115 x68k_bus_dmamem_unmap, 116 x68k_bus_dmamem_mmap, 117 }; 118 119 /* 120 * autoconf stuff 121 */ 122 static int intio_match __P((struct device *, struct cfdata *, void *)); 123 static void intio_attach __P((struct device *, struct device *, void *)); 124 static int intio_search __P((struct device *, struct cfdata *cf, void *)); 125 static int intio_print __P((void *, const char *)); 126 static void intio_alloc_system_ports __P((struct intio_softc*)); 127 128 struct cfattach intio_ca = { 129 sizeof(struct intio_softc), intio_match, intio_attach 130 }; 131 132 static struct intio_interrupt_vector { 133 intio_intr_handler_t iiv_handler; 134 void *iiv_arg; 135 int iiv_intrcntoff; 136 } iiv[256] = {{0,},}; 137 138 extern struct cfdriver intio_cd; 139 140 /* used in console initialization */ 141 extern int x68k_realconfig; 142 int x68k_config_found __P((struct cfdata *, struct device *, 143 void *, cfprint_t)); 144 static struct cfdata *cfdata_intiobus = NULL; 145 146 /* other static functions */ 147 static int scan_intrnames __P((const char *)); 148 #ifdef DEBUG 149 int intio_debug = 0; 150 #endif 151 152 static int 153 intio_match(parent, cf, aux) 154 struct device *parent; 155 struct cfdata *cf; 156 void *aux; /* NULL */ 157 { 158 if (strcmp(aux, intio_cd.cd_name) != 0) 159 return (0); 160 if (cf->cf_unit != 0) 161 return (0); 162 if (x68k_realconfig == 0) 163 cfdata_intiobus = cf; /* XXX */ 164 165 return (1); 166 } 167 168 169 /* used in console initialization: configure only MFP */ 170 static struct intio_attach_args initial_ia = { 171 &intio_bus, 172 0/*XXX*/, 173 174 "mfp", /* ia_name */ 175 MFP_ADDR, /* ia_addr */ 176 0x30, /* ia_size */ 177 MFP_INTR, /* ia_intr */ 178 -1 /* ia_dma */ 179 -1, /* ia_dmaintr */ 180 }; 181 182 static void 183 intio_attach(parent, self, aux) 184 struct device *parent, *self; 185 void *aux; /* NULL */ 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 printf (" mapped at %8p\n", intiobase); 197 198 sc->sc_map = extent_create("intiomap", 199 PHYS_INTIODEV, 200 PHYS_INTIODEV + 0x400000, 201 M_DEVBUF, NULL, NULL, EX_NOWAIT); 202 intio_alloc_system_ports (sc); 203 204 sc->sc_bst = &intio_bus; 205 sc->sc_bst->x68k_bus_device = self; 206 sc->sc_dmat = &intio_bus_dma; 207 sc->sc_dmac = 0; 208 209 bzero(iiv, sizeof (struct intio_interrupt_vector) * 256); 210 211 ia.ia_bst = sc->sc_bst; 212 ia.ia_dmat = sc->sc_dmat; 213 214 config_search (intio_search, self, &ia); 215 } 216 217 static int 218 intio_search(parent, cf, aux) 219 struct device *parent; 220 struct cfdata *cf; 221 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_driver->cd_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 ((*cf->cf_attach->ca_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(aux, name) 242 void *aux; 243 const char *name; 244 { 245 struct intio_attach_args *ia = aux; 246 247 /* if (ia->ia_addr > 0) */ 248 printf (" addr 0x%06x", ia->ia_addr); 249 if (ia->ia_intr > 0) 250 printf (" intr 0x%02x", ia->ia_intr); 251 if (ia->ia_dma >= 0) { 252 printf (" using DMA ch%d", ia->ia_dma); 253 if (ia->ia_dmaintr > 0) 254 printf (" intr 0x%02x and 0x%02x", 255 ia->ia_dmaintr, ia->ia_dmaintr+1); 256 } 257 258 return (QUIET); 259 } 260 261 /* 262 * intio memory map manager 263 */ 264 265 int 266 intio_map_allocate_region(parent, ia, flag) 267 struct device *parent; 268 struct intio_attach_args *ia; 269 enum intio_map_flag flag; /* INTIO_MAP_TESTONLY or INTIO_MAP_ALLOCATE */ 270 { 271 struct intio_softc *sc = (struct intio_softc*) parent; 272 struct extent *map = sc->sc_map; 273 int r; 274 275 r = extent_alloc_region (map, ia->ia_addr, ia->ia_size, 0); 276 #ifdef DEBUG 277 if (intio_debug) 278 extent_print (map); 279 #endif 280 if (r == 0) { 281 if (flag != INTIO_MAP_ALLOCATE) 282 extent_free (map, ia->ia_addr, ia->ia_size, 0); 283 return 0; 284 } 285 286 return -1; 287 } 288 289 int 290 intio_map_free_region(parent, ia) 291 struct device *parent; 292 struct intio_attach_args *ia; 293 { 294 struct intio_softc *sc = (struct intio_softc*) parent; 295 struct extent *map = sc->sc_map; 296 297 extent_free (map, ia->ia_addr, ia->ia_size, 0); 298 #ifdef DEBUG 299 if (intio_debug) 300 extent_print (map); 301 #endif 302 return 0; 303 } 304 305 void 306 intio_alloc_system_ports(sc) 307 struct intio_softc *sc; 308 { 309 extent_alloc_region (sc->sc_map, INTIO_SYSPORT, 16, 0); 310 extent_alloc_region (sc->sc_map, INTIO_SICILIAN, 0x2000, 0); 311 } 312 313 314 /* 315 * intio bus space stuff. 316 */ 317 static int 318 intio_bus_space_map(t, bpa, size, flags, bshp) 319 bus_space_tag_t t; 320 bus_addr_t bpa; 321 bus_size_t size; 322 int flags; 323 bus_space_handle_t *bshp; 324 { 325 /* 326 * Intio bus is mapped permanently. 327 */ 328 *bshp = (bus_space_handle_t) 329 ((u_int) bpa - PHYS_INTIODEV + intiobase); 330 /* 331 * Some devices are mapped on odd addresses only. 332 */ 333 if (flags & BUS_SPACE_MAP_SHIFTED) 334 *bshp += 0x80000001; 335 336 return (0); 337 } 338 339 static void 340 intio_bus_space_unmap(t, bsh, size) 341 bus_space_tag_t t; 342 bus_space_handle_t bsh; 343 bus_size_t size; 344 { 345 return; 346 } 347 348 static int 349 intio_bus_space_subregion(t, bsh, offset, size, nbshp) 350 bus_space_tag_t t; 351 bus_space_handle_t bsh; 352 bus_size_t offset, size; 353 bus_space_handle_t *nbshp; 354 { 355 356 *nbshp = bsh + offset; 357 return (0); 358 } 359 360 361 /* 362 * interrupt handler 363 */ 364 int 365 intio_intr_establish (vector, name, handler, arg) 366 int vector; 367 const char *name; /* XXX */ 368 intio_intr_handler_t handler; 369 void *arg; 370 { 371 if (vector < 16) 372 panic ("Invalid interrupt vector"); 373 if (iiv[vector].iiv_handler) 374 return EBUSY; 375 iiv[vector].iiv_handler = handler; 376 iiv[vector].iiv_arg = arg; 377 iiv[vector].iiv_intrcntoff = scan_intrnames(name); 378 379 return 0; 380 } 381 382 static int 383 scan_intrnames (name) 384 const char *name; 385 { 386 extern char intrnames[]; 387 extern char eintrnames[]; 388 int r = 0; 389 char *p = &intrnames[0]; 390 391 for (;;) { 392 if (*p == 0) { /* new intr */ 393 if (p + strlen(name) >= eintrnames) 394 panic ("Interrupt statics buffer overrun."); 395 strcpy (p, name); 396 break; 397 } 398 if (strcmp(p, name) == 0) 399 break; 400 r++; 401 while (*p++ != 0); 402 } 403 404 return r; 405 } 406 407 int 408 intio_intr_disestablish (vector, arg) 409 int vector; 410 void *arg; 411 { 412 if (iiv[vector].iiv_handler == 0 || iiv[vector].iiv_arg != arg) 413 return EINVAL; 414 iiv[vector].iiv_handler = 0; 415 iiv[vector].iiv_arg = 0; 416 417 return 0; 418 } 419 420 int 421 intio_intr (frame) 422 struct frame *frame; 423 { 424 int vector = frame->f_vector / 4; 425 extern int intrcnt[]; 426 427 #if 0 /* this is not correct now */ 428 /* CAUTION: HERE WE ARE IN SPLHIGH() */ 429 /* LOWER TO APPROPRIATE IPL AT VERY FIRST IN THE HANDLER!! */ 430 #endif 431 if (iiv[vector].iiv_handler == 0) { 432 printf ("Stray interrupt: %d type %x\n", vector, frame->f_format); 433 return 0; 434 } 435 436 intrcnt[iiv[vector].iiv_intrcntoff]++; 437 438 return (*(iiv[vector].iiv_handler)) (iiv[vector].iiv_arg); 439 } 440 441 /* 442 * Intio I/O controler interrupt 443 */ 444 static u_int8_t intio_ivec = 0; 445 446 void 447 intio_set_ivec (vec) 448 int vec; 449 { 450 vec &= 0xfc; 451 452 if (intio_ivec && intio_ivec != (vec & 0xfc)) 453 panic ("Wrong interrupt vector for Sicilian."); 454 455 intio_ivec = vec; 456 intio_set_sicilian_ivec(vec); 457 } 458 459 460 /* 461 * intio bus dma stuff. stolen from arch/i386/isa/isa_machdep.c 462 */ 463 464 /* 465 * Create an INTIO DMA map. 466 */ 467 int 468 _intio_bus_dmamap_create(t, size, nsegments, maxsegsz, boundary, flags, dmamp) 469 bus_dma_tag_t t; 470 bus_size_t size; 471 int nsegments; 472 bus_size_t maxsegsz; 473 bus_size_t boundary; 474 int flags; 475 bus_dmamap_t *dmamp; 476 { 477 struct intio_dma_cookie *cookie; 478 bus_dmamap_t map; 479 int error, cookieflags; 480 void *cookiestore; 481 size_t cookiesize; 482 extern paddr_t avail_end; 483 484 /* Call common function to create the basic map. */ 485 error = x68k_bus_dmamap_create(t, size, nsegments, maxsegsz, boundary, 486 flags, dmamp); 487 if (error) 488 return (error); 489 490 map = *dmamp; 491 map->x68k_dm_cookie = NULL; 492 493 cookiesize = sizeof(struct intio_dma_cookie); 494 495 /* 496 * INTIO only has 24-bits of address space. This means 497 * we can't DMA to pages over 16M. In order to DMA to 498 * arbitrary buffers, we use "bounce buffers" - pages 499 * in memory below the 16M boundary. On DMA reads, 500 * DMA happens to the bounce buffers, and is copied into 501 * the caller's buffer. On writes, data is copied into 502 * but bounce buffer, and the DMA happens from those 503 * pages. To software using the DMA mapping interface, 504 * this looks simply like a data cache. 505 * 506 * If we have more than 16M of RAM in the system, we may 507 * need bounce buffers. We check and remember that here. 508 * 509 * ...or, there is an opposite case. The most segments 510 * a transfer will require is (maxxfer / NBPG) + 1. If 511 * the caller can't handle that many segments (e.g. the 512 * DMAC), we may have to bounce it as well. 513 */ 514 if (avail_end <= t->_bounce_thresh) 515 /* Bouncing not necessary due to memory size. */ 516 map->x68k_dm_bounce_thresh = 0; 517 cookieflags = 0; 518 if (map->x68k_dm_bounce_thresh != 0 || 519 ((map->x68k_dm_size / NBPG) + 1) > map->x68k_dm_segcnt) { 520 cookieflags |= ID_MIGHT_NEED_BOUNCE; 521 cookiesize += (sizeof(bus_dma_segment_t) * map->x68k_dm_segcnt); 522 } 523 524 /* 525 * Allocate our cookie. 526 */ 527 if ((cookiestore = malloc(cookiesize, M_DMAMAP, 528 (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK)) == NULL) { 529 error = ENOMEM; 530 goto out; 531 } 532 memset(cookiestore, 0, cookiesize); 533 cookie = (struct intio_dma_cookie *)cookiestore; 534 cookie->id_flags = cookieflags; 535 map->x68k_dm_cookie = cookie; 536 537 if (cookieflags & ID_MIGHT_NEED_BOUNCE) { 538 /* 539 * Allocate the bounce pages now if the caller 540 * wishes us to do so. 541 */ 542 if ((flags & BUS_DMA_ALLOCNOW) == 0) 543 goto out; 544 545 error = _intio_dma_alloc_bouncebuf(t, map, size, flags); 546 } 547 548 out: 549 if (error) { 550 if (map->x68k_dm_cookie != NULL) 551 free(map->x68k_dm_cookie, M_DMAMAP); 552 x68k_bus_dmamap_destroy(t, map); 553 } 554 return (error); 555 } 556 557 /* 558 * Destroy an INTIO DMA map. 559 */ 560 void 561 _intio_bus_dmamap_destroy(t, map) 562 bus_dma_tag_t t; 563 bus_dmamap_t map; 564 { 565 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 566 567 /* 568 * Free any bounce pages this map might hold. 569 */ 570 if (cookie->id_flags & ID_HAS_BOUNCE) 571 _intio_dma_free_bouncebuf(t, map); 572 573 free(cookie, M_DMAMAP); 574 x68k_bus_dmamap_destroy(t, map); 575 } 576 577 /* 578 * Load an INTIO DMA map with a linear buffer. 579 */ 580 int 581 _intio_bus_dmamap_load(t, map, buf, buflen, p, flags) 582 bus_dma_tag_t t; 583 bus_dmamap_t map; 584 void *buf; 585 bus_size_t buflen; 586 struct proc *p; 587 int flags; 588 { 589 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 590 int error; 591 592 /* 593 * Make sure that on error condition we return "no valid mappings." 594 */ 595 map->dm_mapsize = 0; 596 map->dm_nsegs = 0; 597 598 /* 599 * Try to load the map the normal way. If this errors out, 600 * and we can bounce, we will. 601 */ 602 error = x68k_bus_dmamap_load(t, map, buf, buflen, p, flags); 603 if (error == 0 || 604 (error != 0 && (cookie->id_flags & ID_MIGHT_NEED_BOUNCE) == 0)) 605 return (error); 606 607 /* 608 * Allocate bounce pages, if necessary. 609 */ 610 if ((cookie->id_flags & ID_HAS_BOUNCE) == 0) { 611 error = _intio_dma_alloc_bouncebuf(t, map, buflen, flags); 612 if (error) 613 return (error); 614 } 615 616 /* 617 * Cache a pointer to the caller's buffer and load the DMA map 618 * with the bounce buffer. 619 */ 620 cookie->id_origbuf = buf; 621 cookie->id_origbuflen = buflen; 622 cookie->id_buftype = ID_BUFTYPE_LINEAR; 623 error = x68k_bus_dmamap_load(t, map, cookie->id_bouncebuf, buflen, 624 p, flags); 625 if (error) { 626 /* 627 * Free the bounce pages, unless our resources 628 * are reserved for our exclusive use. 629 */ 630 if ((map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0) 631 _intio_dma_free_bouncebuf(t, map); 632 return (error); 633 } 634 635 /* ...so _intio_bus_dmamap_sync() knows we're bouncing */ 636 cookie->id_flags |= ID_IS_BOUNCING; 637 return (0); 638 } 639 640 /* 641 * Like _intio_bus_dmamap_load(), but for mbufs. 642 */ 643 int 644 _intio_bus_dmamap_load_mbuf(t, map, m0, flags) 645 bus_dma_tag_t t; 646 bus_dmamap_t map; 647 struct mbuf *m0; 648 int flags; 649 { 650 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 651 int error; 652 653 /* 654 * Make sure on error condition we return "no valid mappings." 655 */ 656 map->dm_mapsize = 0; 657 map->dm_nsegs = 0; 658 659 #ifdef DIAGNOSTIC 660 if ((m0->m_flags & M_PKTHDR) == 0) 661 panic("_intio_bus_dmamap_load_mbuf: no packet header"); 662 #endif 663 664 if (m0->m_pkthdr.len > map->x68k_dm_size) 665 return (EINVAL); 666 667 /* 668 * Try to load the map the normal way. If this errors out, 669 * and we can bounce, we will. 670 */ 671 error = x68k_bus_dmamap_load_mbuf(t, map, m0, flags); 672 if (error == 0 || 673 (error != 0 && (cookie->id_flags & ID_MIGHT_NEED_BOUNCE) == 0)) 674 return (error); 675 676 /* 677 * Allocate bounce pages, if necessary. 678 */ 679 if ((cookie->id_flags & ID_HAS_BOUNCE) == 0) { 680 error = _intio_dma_alloc_bouncebuf(t, map, m0->m_pkthdr.len, 681 flags); 682 if (error) 683 return (error); 684 } 685 686 /* 687 * Cache a pointer to the caller's buffer and load the DMA map 688 * with the bounce buffer. 689 */ 690 cookie->id_origbuf = m0; 691 cookie->id_origbuflen = m0->m_pkthdr.len; /* not really used */ 692 cookie->id_buftype = ID_BUFTYPE_MBUF; 693 error = x68k_bus_dmamap_load(t, map, cookie->id_bouncebuf, 694 m0->m_pkthdr.len, NULL, flags); 695 if (error) { 696 /* 697 * Free the bounce pages, unless our resources 698 * are reserved for our exclusive use. 699 */ 700 if ((map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0) 701 _intio_dma_free_bouncebuf(t, map); 702 return (error); 703 } 704 705 /* ...so _intio_bus_dmamap_sync() knows we're bouncing */ 706 cookie->id_flags |= ID_IS_BOUNCING; 707 return (0); 708 } 709 710 /* 711 * Like _intio_bus_dmamap_load(), but for uios. 712 */ 713 int 714 _intio_bus_dmamap_load_uio(t, map, uio, flags) 715 bus_dma_tag_t t; 716 bus_dmamap_t map; 717 struct uio *uio; 718 int flags; 719 { 720 panic("_intio_bus_dmamap_load_uio: not implemented"); 721 } 722 723 /* 724 * Like _intio_bus_dmamap_load(), but for raw memory allocated with 725 * bus_dmamem_alloc(). 726 */ 727 int 728 _intio_bus_dmamap_load_raw(t, map, segs, nsegs, size, flags) 729 bus_dma_tag_t t; 730 bus_dmamap_t map; 731 bus_dma_segment_t *segs; 732 int nsegs; 733 bus_size_t size; 734 int flags; 735 { 736 737 panic("_intio_bus_dmamap_load_raw: not implemented"); 738 } 739 740 /* 741 * Unload an INTIO DMA map. 742 */ 743 void 744 _intio_bus_dmamap_unload(t, map) 745 bus_dma_tag_t t; 746 bus_dmamap_t map; 747 { 748 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 749 750 /* 751 * If we have bounce pages, free them, unless they're 752 * reserved for our exclusive use. 753 */ 754 if ((cookie->id_flags & ID_HAS_BOUNCE) && 755 (map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0) 756 _intio_dma_free_bouncebuf(t, map); 757 758 cookie->id_flags &= ~ID_IS_BOUNCING; 759 cookie->id_buftype = ID_BUFTYPE_INVALID; 760 761 /* 762 * Do the generic bits of the unload. 763 */ 764 x68k_bus_dmamap_unload(t, map); 765 } 766 767 /* 768 * Synchronize an INTIO DMA map. 769 */ 770 void 771 _intio_bus_dmamap_sync(t, map, offset, len, ops) 772 bus_dma_tag_t t; 773 bus_dmamap_t map; 774 bus_addr_t offset; 775 bus_size_t len; 776 int ops; 777 { 778 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 779 780 /* 781 * Mixing PRE and POST operations is not allowed. 782 */ 783 if ((ops & (BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE)) != 0 && 784 (ops & (BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE)) != 0) 785 panic("_intio_bus_dmamap_sync: mix PRE and POST"); 786 787 #ifdef DIAGNOSTIC 788 if ((ops & (BUS_DMASYNC_PREWRITE|BUS_DMASYNC_POSTREAD)) != 0) { 789 if (offset >= map->dm_mapsize) 790 panic("_intio_bus_dmamap_sync: bad offset"); 791 if (len == 0 || (offset + len) > map->dm_mapsize) 792 panic("_intio_bus_dmamap_sync: bad length"); 793 } 794 #endif 795 796 /* 797 * If we're not bouncing, just return; nothing to do. 798 */ 799 if ((cookie->id_flags & ID_IS_BOUNCING) == 0) 800 return; 801 802 switch (cookie->id_buftype) { 803 case ID_BUFTYPE_LINEAR: 804 /* 805 * Nothing to do for pre-read. 806 */ 807 808 if (ops & BUS_DMASYNC_PREWRITE) { 809 /* 810 * Copy the caller's buffer to the bounce buffer. 811 */ 812 memcpy((char *)cookie->id_bouncebuf + offset, 813 (char *)cookie->id_origbuf + offset, len); 814 } 815 816 if (ops & BUS_DMASYNC_POSTREAD) { 817 /* 818 * Copy the bounce buffer to the caller's buffer. 819 */ 820 memcpy((char *)cookie->id_origbuf + offset, 821 (char *)cookie->id_bouncebuf + offset, len); 822 } 823 824 /* 825 * Nothing to do for post-write. 826 */ 827 break; 828 829 case ID_BUFTYPE_MBUF: 830 { 831 struct mbuf *m, *m0 = cookie->id_origbuf; 832 bus_size_t minlen, moff; 833 834 /* 835 * Nothing to do for pre-read. 836 */ 837 838 if (ops & BUS_DMASYNC_PREWRITE) { 839 /* 840 * Copy the caller's buffer to the bounce buffer. 841 */ 842 m_copydata(m0, offset, len, 843 (char *)cookie->id_bouncebuf + offset); 844 } 845 846 if (ops & BUS_DMASYNC_POSTREAD) { 847 /* 848 * Copy the bounce buffer to the caller's buffer. 849 */ 850 for (moff = offset, m = m0; m != NULL && len != 0; 851 m = m->m_next) { 852 /* Find the beginning mbuf. */ 853 if (moff >= m->m_len) { 854 moff -= m->m_len; 855 continue; 856 } 857 858 /* 859 * Now at the first mbuf to sync; nail 860 * each one until we have exhausted the 861 * length. 862 */ 863 minlen = len < m->m_len - moff ? 864 len : m->m_len - moff; 865 866 memcpy(mtod(m, caddr_t) + moff, 867 (char *)cookie->id_bouncebuf + offset, 868 minlen); 869 870 moff = 0; 871 len -= minlen; 872 offset += minlen; 873 } 874 } 875 876 /* 877 * Nothing to do for post-write. 878 */ 879 break; 880 } 881 882 case ID_BUFTYPE_UIO: 883 panic("_intio_bus_dmamap_sync: ID_BUFTYPE_UIO"); 884 break; 885 886 case ID_BUFTYPE_RAW: 887 panic("_intio_bus_dmamap_sync: ID_BUFTYPE_RAW"); 888 break; 889 890 case ID_BUFTYPE_INVALID: 891 panic("_intio_bus_dmamap_sync: ID_BUFTYPE_INVALID"); 892 break; 893 894 default: 895 printf("unknown buffer type %d\n", cookie->id_buftype); 896 panic("_intio_bus_dmamap_sync"); 897 } 898 } 899 900 /* 901 * Allocate memory safe for INTIO DMA. 902 */ 903 int 904 _intio_bus_dmamem_alloc(t, size, alignment, boundary, segs, nsegs, rsegs, flags) 905 bus_dma_tag_t t; 906 bus_size_t size, alignment, boundary; 907 bus_dma_segment_t *segs; 908 int nsegs; 909 int *rsegs; 910 int flags; 911 { 912 paddr_t high; 913 extern paddr_t avail_end; 914 915 if (avail_end > INTIO_DMA_BOUNCE_THRESHOLD) 916 high = trunc_page(INTIO_DMA_BOUNCE_THRESHOLD); 917 else 918 high = trunc_page(avail_end); 919 920 return (x68k_bus_dmamem_alloc_range(t, size, alignment, boundary, 921 segs, nsegs, rsegs, flags, 0, high)); 922 } 923 924 /********************************************************************** 925 * INTIO DMA utility functions 926 **********************************************************************/ 927 928 int 929 _intio_dma_alloc_bouncebuf(t, map, size, flags) 930 bus_dma_tag_t t; 931 bus_dmamap_t map; 932 bus_size_t size; 933 int flags; 934 { 935 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 936 int error = 0; 937 938 cookie->id_bouncebuflen = round_page(size); 939 error = _intio_bus_dmamem_alloc(t, cookie->id_bouncebuflen, 940 NBPG, map->x68k_dm_boundary, cookie->id_bouncesegs, 941 map->x68k_dm_segcnt, &cookie->id_nbouncesegs, flags); 942 if (error) 943 goto out; 944 error = x68k_bus_dmamem_map(t, cookie->id_bouncesegs, 945 cookie->id_nbouncesegs, cookie->id_bouncebuflen, 946 (caddr_t *)&cookie->id_bouncebuf, flags); 947 948 out: 949 if (error) { 950 x68k_bus_dmamem_free(t, cookie->id_bouncesegs, 951 cookie->id_nbouncesegs); 952 cookie->id_bouncebuflen = 0; 953 cookie->id_nbouncesegs = 0; 954 } else { 955 cookie->id_flags |= ID_HAS_BOUNCE; 956 } 957 958 return (error); 959 } 960 961 void 962 _intio_dma_free_bouncebuf(t, map) 963 bus_dma_tag_t t; 964 bus_dmamap_t map; 965 { 966 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 967 968 x68k_bus_dmamem_unmap(t, cookie->id_bouncebuf, 969 cookie->id_bouncebuflen); 970 x68k_bus_dmamem_free(t, cookie->id_bouncesegs, 971 cookie->id_nbouncesegs); 972 cookie->id_bouncebuflen = 0; 973 cookie->id_nbouncesegs = 0; 974 cookie->id_flags &= ~ID_HAS_BOUNCE; 975 } 976
Indexes created Fri Oct 03 02:09:57 GMT 2025