intio.c revision 1.35
1 /* $NetBSD: intio.c,v 1.35 2008/05/10 11:49:37 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * NetBSD/x68k internal I/O virtual bus. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: intio.c,v 1.35 2008/05/10 11:49:37 martin Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/device.h> 39 #include <sys/malloc.h> 40 #include <sys/mbuf.h> 41 #include <sys/extent.h> 42 #include <uvm/uvm_extern.h> 43 44 #include <machine/bus.h> 45 #include <machine/cpu.h> 46 #include <machine/frame.h> 47 48 #include <arch/x68k/dev/intiovar.h> 49 #include <arch/x68k/dev/mfp.h> 50 51 52 /* 53 * bus_space(9) interface 54 */ 55 static int intio_bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, bus_space_handle_t *); 56 static void intio_bus_space_unmap(bus_space_tag_t, bus_space_handle_t, bus_size_t); 57 static int intio_bus_space_subregion(bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_size_t, bus_space_handle_t *); 58 59 static struct x68k_bus_space intio_bus = { 60 #if 0 61 X68K_INTIO_BUS, 62 #endif 63 intio_bus_space_map, intio_bus_space_unmap, intio_bus_space_subregion, 64 x68k_bus_space_alloc, x68k_bus_space_free, 65 #if 0 66 x68k_bus_space_barrier, 67 #endif 68 69 0 70 }; 71 72 /* 73 * bus_dma(9) interface 74 */ 75 #define INTIO_DMA_BOUNCE_THRESHOLD (16 * 1024 * 1024) 76 int _intio_bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, 77 bus_size_t, bus_size_t, int, bus_dmamap_t *); 78 void _intio_bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); 79 int _intio_bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, 80 bus_size_t, struct proc *, int); 81 int _intio_bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, 82 struct mbuf *, int); 83 int _intio_bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, 84 struct uio *, int); 85 int _intio_bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, 86 bus_dma_segment_t *, int, bus_size_t, int); 87 void _intio_bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); 88 void _intio_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, 89 bus_addr_t, bus_size_t, int); 90 91 int _intio_bus_dmamem_alloc(bus_dma_tag_t, bus_size_t, bus_size_t, 92 bus_size_t, bus_dma_segment_t *, int, int *, int); 93 94 int _intio_dma_alloc_bouncebuf(bus_dma_tag_t, bus_dmamap_t, 95 bus_size_t, int); 96 void _intio_dma_free_bouncebuf(bus_dma_tag_t, bus_dmamap_t); 97 98 struct x68k_bus_dma intio_bus_dma = { 99 INTIO_DMA_BOUNCE_THRESHOLD, 100 _intio_bus_dmamap_create, 101 _intio_bus_dmamap_destroy, 102 _intio_bus_dmamap_load, 103 _intio_bus_dmamap_load_mbuf, 104 _intio_bus_dmamap_load_uio, 105 _intio_bus_dmamap_load_raw, 106 _intio_bus_dmamap_unload, 107 _intio_bus_dmamap_sync, 108 _intio_bus_dmamem_alloc, 109 x68k_bus_dmamem_free, 110 x68k_bus_dmamem_map, 111 x68k_bus_dmamem_unmap, 112 x68k_bus_dmamem_mmap, 113 }; 114 115 /* 116 * autoconf stuff 117 */ 118 static int intio_match(struct device *, struct cfdata *, void *); 119 static void intio_attach(struct device *, struct device *, void *); 120 static int intio_search(struct device *, struct cfdata *cf, 121 const int *, void *); 122 static int intio_print(void *, const char *); 123 static void intio_alloc_system_ports(struct intio_softc*); 124 125 CFATTACH_DECL(intio, sizeof(struct intio_softc), 126 intio_match, intio_attach, NULL, NULL); 127 128 extern struct cfdriver intio_cd; 129 130 static int intio_attached; 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 /* used in console initialization */ 139 extern int x68k_realconfig; 140 int x68k_config_found(struct cfdata *, struct device *, void *, cfprint_t); 141 static struct cfdata *cfdata_intiobus = NULL; 142 143 /* other static functions */ 144 static int scan_intrnames(const char *); 145 #ifdef DEBUG 146 int intio_debug = 0; 147 #endif 148 149 static int 150 intio_match(struct device *parent, struct cfdata *cf, void *aux) 151 { 152 153 if (strcmp(aux, intio_cd.cd_name) != 0) 154 return (0); 155 if (intio_attached) 156 return (0); 157 if (x68k_realconfig == 0) 158 cfdata_intiobus = cf; /* XXX */ 159 160 return (1); 161 } 162 163 164 /* used in console initialization: configure only MFP */ 165 static struct intio_attach_args initial_ia = { 166 &intio_bus, 167 0/*XXX*/, 168 169 "mfp", /* ia_name */ 170 MFP_ADDR, /* ia_addr */ 171 0x30, /* ia_size */ 172 MFP_INTR, /* ia_intr */ 173 -1 /* ia_dma */ 174 -1, /* ia_dmaintr */ 175 }; 176 177 static void 178 intio_attach(struct device *parent, struct device *self, void *aux) 179 { 180 struct intio_softc *sc = (struct intio_softc *)self; 181 struct intio_attach_args ia; 182 183 if (self == NULL) { 184 /* console only init */ 185 x68k_config_found(cfdata_intiobus, NULL, &initial_ia, NULL); 186 return; 187 } 188 189 intio_attached = 1; 190 191 printf(" mapped at %8p\n", intiobase); 192 193 sc->sc_map = extent_create("intiomap", 194 PHYS_INTIODEV, 195 PHYS_INTIODEV + 0x400000, 196 M_DEVBUF, NULL, 0, EX_NOWAIT); 197 intio_alloc_system_ports(sc); 198 199 sc->sc_bst = &intio_bus; 200 sc->sc_bst->x68k_bus_device = self; 201 sc->sc_dmat = &intio_bus_dma; 202 sc->sc_dmac = 0; 203 204 memset(iiv, 0, sizeof(struct intio_interrupt_vector) * 256); 205 206 ia.ia_bst = sc->sc_bst; 207 ia.ia_dmat = sc->sc_dmat; 208 209 config_search_ia(intio_search, self, "intio", &ia); 210 } 211 212 static int 213 intio_search(struct device *parent, struct cfdata *cf, 214 const int *ldesc, void *aux) 215 { 216 struct intio_attach_args *ia = aux; 217 struct intio_softc *sc = (struct intio_softc *)parent; 218 219 ia->ia_bst = sc->sc_bst; 220 ia->ia_dmat = sc->sc_dmat; 221 ia->ia_name = cf->cf_name; 222 ia->ia_addr = cf->cf_addr; 223 ia->ia_intr = cf->cf_intr; 224 ia->ia_dma = cf->cf_dma; 225 ia->ia_dmaintr = cf->cf_dmaintr; 226 227 if (config_match(parent, cf, ia) > 0) 228 config_attach(parent, cf, ia, intio_print); 229 230 return (0); 231 } 232 233 static int 234 intio_print(void *aux, const char *name) 235 { 236 struct intio_attach_args *ia = aux; 237 238 /* if (ia->ia_addr > 0) */ 239 aprint_normal(" addr 0x%06x", ia->ia_addr); 240 if (ia->ia_intr > 0) 241 aprint_normal(" intr 0x%02x", ia->ia_intr); 242 if (ia->ia_dma >= 0) { 243 aprint_normal(" using DMA ch%d", ia->ia_dma); 244 if (ia->ia_dmaintr > 0) 245 aprint_normal(" intr 0x%02x and 0x%02x", 246 ia->ia_dmaintr, ia->ia_dmaintr+1); 247 } 248 249 return (QUIET); 250 } 251 252 /* 253 * intio memory map manager 254 */ 255 256 int 257 intio_map_allocate_region(struct device *parent, struct intio_attach_args *ia, 258 enum intio_map_flag flag) 259 { 260 struct intio_softc *sc = (struct intio_softc *)parent; 261 struct extent *map = sc->sc_map; 262 int r; 263 264 r = extent_alloc_region(map, ia->ia_addr, ia->ia_size, 0); 265 #ifdef DEBUG 266 if (intio_debug) 267 extent_print(map); 268 #endif 269 if (r == 0) { 270 if (flag != INTIO_MAP_ALLOCATE) 271 extent_free(map, ia->ia_addr, ia->ia_size, 0); 272 return 0; 273 } 274 275 return -1; 276 } 277 278 int 279 intio_map_free_region(struct device *parent, struct intio_attach_args *ia) 280 { 281 struct intio_softc *sc = (struct intio_softc*) parent; 282 struct extent *map = sc->sc_map; 283 284 extent_free(map, ia->ia_addr, ia->ia_size, 0); 285 #ifdef DEBUG 286 if (intio_debug) 287 extent_print(map); 288 #endif 289 return 0; 290 } 291 292 void 293 intio_alloc_system_ports(struct intio_softc *sc) 294 { 295 extent_alloc_region(sc->sc_map, INTIO_SYSPORT, 16, 0); 296 extent_alloc_region(sc->sc_map, INTIO_SICILIAN, 0x2000, 0); 297 } 298 299 300 /* 301 * intio bus space stuff. 302 */ 303 static int 304 intio_bus_space_map(bus_space_tag_t t, bus_addr_t bpa, bus_size_t size, 305 int flags, bus_space_handle_t *bshp) 306 { 307 /* 308 * Intio bus is mapped permanently. 309 */ 310 *bshp = (bus_space_handle_t) 311 ((u_int) bpa - PHYS_INTIODEV + intiobase); 312 /* 313 * Some devices are mapped on odd or even addresses only. 314 */ 315 if ((flags & BUS_SPACE_MAP_SHIFTED_MASK) == BUS_SPACE_MAP_SHIFTED_ODD) 316 *bshp += 0x80000001; 317 if ((flags & BUS_SPACE_MAP_SHIFTED_MASK) == BUS_SPACE_MAP_SHIFTED_EVEN) 318 *bshp += 0x80000000; 319 320 return (0); 321 } 322 323 static void 324 intio_bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh, 325 bus_size_t size) 326 { 327 return; 328 } 329 330 static int 331 intio_bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh, 332 bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) 333 { 334 335 *nbshp = bsh + offset; 336 return (0); 337 } 338 339 340 /* 341 * interrupt handler 342 */ 343 int 344 intio_intr_establish(int vector, const char *name, intio_intr_handler_t handler, 345 void *arg) 346 { 347 if (vector < 16) 348 panic("Invalid interrupt vector"); 349 if (iiv[vector].iiv_handler) 350 return EBUSY; 351 iiv[vector].iiv_handler = handler; 352 iiv[vector].iiv_arg = arg; 353 iiv[vector].iiv_intrcntoff = scan_intrnames(name); 354 355 return 0; 356 } 357 358 static int 359 scan_intrnames(const char *name) 360 { 361 extern char intrnames[]; 362 extern char eintrnames[]; 363 int r = 0; 364 char *p = &intrnames[0]; 365 366 for (;;) { 367 if (*p == 0) { /* new intr */ 368 if (p + strlen(name) >= eintrnames) 369 panic("Interrupt statics buffer overrun."); 370 strcpy(p, name); 371 break; 372 } 373 if (strcmp(p, name) == 0) 374 break; 375 r++; 376 while (*p++ != 0); 377 } 378 379 return r; 380 } 381 382 int 383 intio_intr_disestablish(int vector, void *arg) 384 { 385 if (iiv[vector].iiv_handler == 0 || iiv[vector].iiv_arg != arg) 386 return EINVAL; 387 iiv[vector].iiv_handler = 0; 388 iiv[vector].iiv_arg = 0; 389 390 return 0; 391 } 392 393 int 394 intio_intr(struct frame *frame) 395 { 396 int vector = frame->f_vector / 4; 397 extern int intrcnt[]; 398 399 #if 0 /* this is not correct now */ 400 /* CAUTION: HERE WE ARE IN SPLHIGH() */ 401 /* LOWER TO APPROPRIATE IPL AT VERY FIRST IN THE HANDLER!! */ 402 #endif 403 if (iiv[vector].iiv_handler == 0) { 404 printf("Stray interrupt: %d type %x, pc %x\n", 405 vector, frame->f_format, frame->f_pc); 406 return 0; 407 } 408 409 intrcnt[iiv[vector].iiv_intrcntoff]++; 410 411 return (*(iiv[vector].iiv_handler))(iiv[vector].iiv_arg); 412 } 413 414 /* 415 * Intio I/O controller interrupt 416 */ 417 static u_int8_t intio_ivec = 0; 418 419 void 420 intio_set_ivec(int vec) 421 { 422 vec &= 0xfc; 423 424 if (intio_ivec && intio_ivec != (vec & 0xfc)) 425 panic("Wrong interrupt vector for Sicilian."); 426 427 intio_ivec = vec; 428 intio_set_sicilian_ivec(vec); 429 } 430 431 432 /* 433 * intio bus DMA stuff. stolen from arch/i386/isa/isa_machdep.c 434 */ 435 436 /* 437 * Create an INTIO DMA map. 438 */ 439 int 440 _intio_bus_dmamap_create(bus_dma_tag_t t, bus_size_t size, int nsegments, 441 bus_size_t maxsegsz, bus_size_t boundary, int flags, bus_dmamap_t *dmamp) 442 { 443 struct intio_dma_cookie *cookie; 444 bus_dmamap_t map; 445 int error, cookieflags; 446 void *cookiestore; 447 size_t cookiesize; 448 extern paddr_t avail_end; 449 450 /* Call common function to create the basic map. */ 451 error = x68k_bus_dmamap_create(t, size, nsegments, maxsegsz, boundary, 452 flags, dmamp); 453 if (error) 454 return (error); 455 456 map = *dmamp; 457 map->x68k_dm_cookie = NULL; 458 459 cookiesize = sizeof(struct intio_dma_cookie); 460 461 /* 462 * INTIO only has 24-bits of address space. This means 463 * we can't DMA to pages over 16M. In order to DMA to 464 * arbitrary buffers, we use "bounce buffers" - pages 465 * in memory below the 16M boundary. On DMA reads, 466 * DMA happens to the bounce buffers, and is copied into 467 * the caller's buffer. On writes, data is copied into 468 * but bounce buffer, and the DMA happens from those 469 * pages. To software using the DMA mapping interface, 470 * this looks simply like a data cache. 471 * 472 * If we have more than 16M of RAM in the system, we may 473 * need bounce buffers. We check and remember that here. 474 * 475 * ...or, there is an opposite case. The most segments 476 * a transfer will require is (maxxfer / PAGE_SIZE) + 1. If 477 * the caller can't handle that many segments (e.g. the 478 * DMAC), we may have to bounce it as well. 479 */ 480 if (avail_end <= t->_bounce_thresh) 481 /* Bouncing not necessary due to memory size. */ 482 map->x68k_dm_bounce_thresh = 0; 483 cookieflags = 0; 484 if (map->x68k_dm_bounce_thresh != 0 || 485 ((map->x68k_dm_size / PAGE_SIZE) + 1) > map->x68k_dm_segcnt) { 486 cookieflags |= ID_MIGHT_NEED_BOUNCE; 487 cookiesize += (sizeof(bus_dma_segment_t) * map->x68k_dm_segcnt); 488 } 489 490 /* 491 * Allocate our cookie. 492 */ 493 if ((cookiestore = malloc(cookiesize, M_DMAMAP, 494 (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK)) == NULL) { 495 error = ENOMEM; 496 goto out; 497 } 498 memset(cookiestore, 0, cookiesize); 499 cookie = (struct intio_dma_cookie *)cookiestore; 500 cookie->id_flags = cookieflags; 501 map->x68k_dm_cookie = cookie; 502 503 if (cookieflags & ID_MIGHT_NEED_BOUNCE) { 504 /* 505 * Allocate the bounce pages now if the caller 506 * wishes us to do so. 507 */ 508 if ((flags & BUS_DMA_ALLOCNOW) == 0) 509 goto out; 510 511 error = _intio_dma_alloc_bouncebuf(t, map, size, flags); 512 } 513 514 out: 515 if (error) { 516 if (map->x68k_dm_cookie != NULL) 517 free(map->x68k_dm_cookie, M_DMAMAP); 518 x68k_bus_dmamap_destroy(t, map); 519 } 520 return (error); 521 } 522 523 /* 524 * Destroy an INTIO DMA map. 525 */ 526 void 527 _intio_bus_dmamap_destroy(bus_dma_tag_t t, bus_dmamap_t map) 528 { 529 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 530 531 /* 532 * Free any bounce pages this map might hold. 533 */ 534 if (cookie->id_flags & ID_HAS_BOUNCE) 535 _intio_dma_free_bouncebuf(t, map); 536 537 free(cookie, M_DMAMAP); 538 x68k_bus_dmamap_destroy(t, map); 539 } 540 541 /* 542 * Load an INTIO DMA map with a linear buffer. 543 */ 544 int 545 _intio_bus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf, 546 bus_size_t buflen, struct proc *p, int flags) 547 { 548 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 549 int error; 550 551 /* 552 * Make sure that on error condition we return "no valid mappings." 553 */ 554 map->dm_mapsize = 0; 555 map->dm_nsegs = 0; 556 557 /* 558 * Try to load the map the normal way. If this errors out, 559 * and we can bounce, we will. 560 */ 561 error = x68k_bus_dmamap_load(t, map, buf, buflen, p, flags); 562 if (error == 0 || 563 (error != 0 && (cookie->id_flags & ID_MIGHT_NEED_BOUNCE) == 0)) 564 return (error); 565 566 /* 567 * Allocate bounce pages, if necessary. 568 */ 569 if ((cookie->id_flags & ID_HAS_BOUNCE) == 0) { 570 error = _intio_dma_alloc_bouncebuf(t, map, buflen, flags); 571 if (error) 572 return (error); 573 } 574 575 /* 576 * Cache a pointer to the caller's buffer and load the DMA map 577 * with the bounce buffer. 578 */ 579 cookie->id_origbuf = buf; 580 cookie->id_origbuflen = buflen; 581 cookie->id_buftype = ID_BUFTYPE_LINEAR; 582 error = x68k_bus_dmamap_load(t, map, cookie->id_bouncebuf, buflen, 583 p, flags); 584 if (error) { 585 /* 586 * Free the bounce pages, unless our resources 587 * are reserved for our exclusive use. 588 */ 589 if ((map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0) 590 _intio_dma_free_bouncebuf(t, map); 591 return (error); 592 } 593 594 /* ...so _intio_bus_dmamap_sync() knows we're bouncing */ 595 cookie->id_flags |= ID_IS_BOUNCING; 596 return (0); 597 } 598 599 /* 600 * Like _intio_bus_dmamap_load(), but for mbufs. 601 */ 602 int 603 _intio_bus_dmamap_load_mbuf(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m0, 604 int flags) 605 { 606 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 607 int error; 608 609 /* 610 * Make sure on error condition we return "no valid mappings." 611 */ 612 map->dm_mapsize = 0; 613 map->dm_nsegs = 0; 614 615 #ifdef DIAGNOSTIC 616 if ((m0->m_flags & M_PKTHDR) == 0) 617 panic("_intio_bus_dmamap_load_mbuf: no packet header"); 618 #endif 619 620 if (m0->m_pkthdr.len > map->x68k_dm_size) 621 return (EINVAL); 622 623 /* 624 * Try to load the map the normal way. If this errors out, 625 * and we can bounce, we will. 626 */ 627 error = x68k_bus_dmamap_load_mbuf(t, map, m0, flags); 628 if (error == 0 || 629 (error != 0 && (cookie->id_flags & ID_MIGHT_NEED_BOUNCE) == 0)) 630 return (error); 631 632 /* 633 * Allocate bounce pages, if necessary. 634 */ 635 if ((cookie->id_flags & ID_HAS_BOUNCE) == 0) { 636 error = _intio_dma_alloc_bouncebuf(t, map, m0->m_pkthdr.len, 637 flags); 638 if (error) 639 return (error); 640 } 641 642 /* 643 * Cache a pointer to the caller's buffer and load the DMA map 644 * with the bounce buffer. 645 */ 646 cookie->id_origbuf = m0; 647 cookie->id_origbuflen = m0->m_pkthdr.len; /* not really used */ 648 cookie->id_buftype = ID_BUFTYPE_MBUF; 649 error = x68k_bus_dmamap_load(t, map, cookie->id_bouncebuf, 650 m0->m_pkthdr.len, NULL, flags); 651 if (error) { 652 /* 653 * Free the bounce pages, unless our resources 654 * are reserved for our exclusive use. 655 */ 656 if ((map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0) 657 _intio_dma_free_bouncebuf(t, map); 658 return (error); 659 } 660 661 /* ...so _intio_bus_dmamap_sync() knows we're bouncing */ 662 cookie->id_flags |= ID_IS_BOUNCING; 663 return (0); 664 } 665 666 /* 667 * Like _intio_bus_dmamap_load(), but for uios. 668 */ 669 int 670 _intio_bus_dmamap_load_uio(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio, 671 int flags) 672 { 673 panic("_intio_bus_dmamap_load_uio: not implemented"); 674 } 675 676 /* 677 * Like _intio_bus_dmamap_load(), but for raw memory allocated with 678 * bus_dmamem_alloc(). 679 */ 680 int 681 _intio_bus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map, 682 bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags) 683 { 684 685 panic("_intio_bus_dmamap_load_raw: not implemented"); 686 } 687 688 /* 689 * Unload an INTIO DMA map. 690 */ 691 void 692 _intio_bus_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map) 693 { 694 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 695 696 /* 697 * If we have bounce pages, free them, unless they're 698 * reserved for our exclusive use. 699 */ 700 if ((cookie->id_flags & ID_HAS_BOUNCE) && 701 (map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0) 702 _intio_dma_free_bouncebuf(t, map); 703 704 cookie->id_flags &= ~ID_IS_BOUNCING; 705 cookie->id_buftype = ID_BUFTYPE_INVALID; 706 707 /* 708 * Do the generic bits of the unload. 709 */ 710 x68k_bus_dmamap_unload(t, map); 711 } 712 713 /* 714 * Synchronize an INTIO DMA map. 715 */ 716 void 717 _intio_bus_dmamap_sync(bus_dma_tag_t t, bus_dmamap_t map, bus_addr_t offset, 718 bus_size_t len, int ops) 719 { 720 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 721 722 /* 723 * Mixing PRE and POST operations is not allowed. 724 */ 725 if ((ops & (BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE)) != 0 && 726 (ops & (BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE)) != 0) 727 panic("_intio_bus_dmamap_sync: mix PRE and POST"); 728 729 #ifdef DIAGNOSTIC 730 if ((ops & (BUS_DMASYNC_PREWRITE|BUS_DMASYNC_POSTREAD)) != 0) { 731 if (offset >= map->dm_mapsize) 732 panic("_intio_bus_dmamap_sync: bad offset"); 733 if (len == 0 || (offset + len) > map->dm_mapsize) 734 panic("_intio_bus_dmamap_sync: bad length"); 735 } 736 #endif 737 738 /* 739 * If we're not bouncing, just return; nothing to do. 740 */ 741 if ((cookie->id_flags & ID_IS_BOUNCING) == 0) 742 return; 743 744 switch (cookie->id_buftype) { 745 case ID_BUFTYPE_LINEAR: 746 /* 747 * Nothing to do for pre-read. 748 */ 749 750 if (ops & BUS_DMASYNC_PREWRITE) { 751 /* 752 * Copy the caller's buffer to the bounce buffer. 753 */ 754 memcpy((char *)cookie->id_bouncebuf + offset, 755 (char *)cookie->id_origbuf + offset, len); 756 } 757 758 if (ops & BUS_DMASYNC_POSTREAD) { 759 /* 760 * Copy the bounce buffer to the caller's buffer. 761 */ 762 memcpy((char *)cookie->id_origbuf + offset, 763 (char *)cookie->id_bouncebuf + offset, len); 764 } 765 766 /* 767 * Nothing to do for post-write. 768 */ 769 break; 770 771 case ID_BUFTYPE_MBUF: 772 { 773 struct mbuf *m, *m0 = cookie->id_origbuf; 774 bus_size_t minlen, moff; 775 776 /* 777 * Nothing to do for pre-read. 778 */ 779 780 if (ops & BUS_DMASYNC_PREWRITE) { 781 /* 782 * Copy the caller's buffer to the bounce buffer. 783 */ 784 m_copydata(m0, offset, len, 785 (char *)cookie->id_bouncebuf + offset); 786 } 787 788 if (ops & BUS_DMASYNC_POSTREAD) { 789 /* 790 * Copy the bounce buffer to the caller's buffer. 791 */ 792 for (moff = offset, m = m0; m != NULL && len != 0; 793 m = m->m_next) { 794 /* Find the beginning mbuf. */ 795 if (moff >= m->m_len) { 796 moff -= m->m_len; 797 continue; 798 } 799 800 /* 801 * Now at the first mbuf to sync; nail 802 * each one until we have exhausted the 803 * length. 804 */ 805 minlen = len < m->m_len - moff ? 806 len : m->m_len - moff; 807 808 memcpy(mtod(m, char *) + moff, 809 (char *)cookie->id_bouncebuf + offset, 810 minlen); 811 812 moff = 0; 813 len -= minlen; 814 offset += minlen; 815 } 816 } 817 818 /* 819 * Nothing to do for post-write. 820 */ 821 break; 822 } 823 824 case ID_BUFTYPE_UIO: 825 panic("_intio_bus_dmamap_sync: ID_BUFTYPE_UIO"); 826 break; 827 828 case ID_BUFTYPE_RAW: 829 panic("_intio_bus_dmamap_sync: ID_BUFTYPE_RAW"); 830 break; 831 832 case ID_BUFTYPE_INVALID: 833 panic("_intio_bus_dmamap_sync: ID_BUFTYPE_INVALID"); 834 break; 835 836 default: 837 printf("unknown buffer type %d\n", cookie->id_buftype); 838 panic("_intio_bus_dmamap_sync"); 839 } 840 } 841 842 /* 843 * Allocate memory safe for INTIO DMA. 844 */ 845 int 846 _intio_bus_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment, 847 bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs, 848 int flags) 849 { 850 paddr_t high; 851 extern paddr_t avail_end; 852 853 if (avail_end > INTIO_DMA_BOUNCE_THRESHOLD) 854 high = trunc_page(INTIO_DMA_BOUNCE_THRESHOLD); 855 else 856 high = trunc_page(avail_end); 857 858 return (x68k_bus_dmamem_alloc_range(t, size, alignment, boundary, 859 segs, nsegs, rsegs, flags, 0, high)); 860 } 861 862 /********************************************************************** 863 * INTIO DMA utility functions 864 **********************************************************************/ 865 866 int 867 _intio_dma_alloc_bouncebuf(bus_dma_tag_t t, bus_dmamap_t map, bus_size_t size, 868 int flags) 869 { 870 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 871 int error = 0; 872 873 cookie->id_bouncebuflen = round_page(size); 874 error = _intio_bus_dmamem_alloc(t, cookie->id_bouncebuflen, 875 PAGE_SIZE, map->x68k_dm_boundary, cookie->id_bouncesegs, 876 map->x68k_dm_segcnt, &cookie->id_nbouncesegs, flags); 877 if (error) 878 goto out; 879 error = x68k_bus_dmamem_map(t, cookie->id_bouncesegs, 880 cookie->id_nbouncesegs, cookie->id_bouncebuflen, 881 (void **)&cookie->id_bouncebuf, flags); 882 883 out: 884 if (error) { 885 x68k_bus_dmamem_free(t, cookie->id_bouncesegs, 886 cookie->id_nbouncesegs); 887 cookie->id_bouncebuflen = 0; 888 cookie->id_nbouncesegs = 0; 889 } else { 890 cookie->id_flags |= ID_HAS_BOUNCE; 891 } 892 893 return (error); 894 } 895 896 void 897 _intio_dma_free_bouncebuf(bus_dma_tag_t t, bus_dmamap_t map) 898 { 899 struct intio_dma_cookie *cookie = map->x68k_dm_cookie; 900 901 x68k_bus_dmamem_unmap(t, cookie->id_bouncebuf, 902 cookie->id_bouncebuflen); 903 x68k_bus_dmamem_free(t, cookie->id_bouncesegs, 904 cookie->id_nbouncesegs); 905 cookie->id_bouncebuflen = 0; 906 cookie->id_nbouncesegs = 0; 907 cookie->id_flags &= ~ID_HAS_BOUNCE; 908 } 909
Indexes created Tue Sep 23 07:09:52 GMT 2025