ebus.c revision 1.23
1 /* $NetBSD: ebus.c,v 1.23 2001/07/20 00:07:12 eeh Exp $ */ 2 3 /* 4 * Copyright (c) 1999, 2000 Matthew R. Green 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. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include "opt_ddb.h" 32 33 /* 34 * UltraSPARC 5 and beyond ebus support. 35 * 36 * note that this driver is not complete: 37 * - ebus2 dma code is completely unwritten 38 * - interrupt establish is written and appears to work 39 * - bus map code is written and appears to work 40 */ 41 42 #undef DEBUG 43 #define DEBUG 44 45 #ifdef DEBUG 46 #define EDB_PROM 0x01 47 #define EDB_CHILD 0x02 48 #define EDB_INTRMAP 0x04 49 #define EDB_BUSMAP 0x08 50 #define EDB_BUSDMA 0x10 51 #define EDB_INTR 0x20 52 int ebus_debug = 0x0; 53 #define DPRINTF(l, s) do { if (ebus_debug & l) printf s; } while (0) 54 #else 55 #define DPRINTF(l, s) 56 #endif 57 58 #include <sys/param.h> 59 #include <sys/conf.h> 60 #include <sys/device.h> 61 #include <sys/errno.h> 62 #include <sys/extent.h> 63 #include <sys/malloc.h> 64 #include <sys/systm.h> 65 #include <sys/time.h> 66 67 #define _SPARC_BUS_DMA_PRIVATE 68 #include <machine/bus.h> 69 #include <machine/autoconf.h> 70 #include <machine/openfirm.h> 71 72 #include <dev/pci/pcivar.h> 73 #include <dev/pci/pcireg.h> 74 #include <dev/pci/pcidevs.h> 75 76 #include <sparc64/dev/iommureg.h> 77 #include <sparc64/dev/iommuvar.h> 78 #include <sparc64/dev/psychoreg.h> 79 #include <sparc64/dev/psychovar.h> 80 #include <sparc64/dev/ebusreg.h> 81 #include <sparc64/dev/ebusvar.h> 82 #include <sparc64/sparc64/cache.h> 83 84 int ebus_match __P((struct device *, struct cfdata *, void *)); 85 void ebus_attach __P((struct device *, struct device *, void *)); 86 87 struct cfattach ebus_ca = { 88 sizeof(struct ebus_softc), ebus_match, ebus_attach 89 }; 90 91 int ebus_setup_attach_args __P((struct ebus_softc *, int, 92 struct ebus_attach_args *)); 93 void ebus_destroy_attach_args __P((struct ebus_attach_args *)); 94 int ebus_print __P((void *, const char *)); 95 void ebus_find_ino __P((struct ebus_softc *, struct ebus_attach_args *)); 96 int ebus_find_node __P((struct pci_attach_args *)); 97 98 /* 99 * here are our bus space and bus dma routines. 100 */ 101 static int ebus_bus_mmap __P((bus_space_tag_t, bus_type_t, bus_addr_t, 102 int, bus_space_handle_t *)); 103 static int _ebus_bus_map __P((bus_space_tag_t, bus_type_t, bus_addr_t, 104 bus_size_t, int, vaddr_t, 105 bus_space_handle_t *)); 106 static void *ebus_intr_establish __P((bus_space_tag_t, int, int, int, 107 int (*) __P((void *)), void *)); 108 109 static int ebus_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *, 110 bus_size_t, struct proc *, int)); 111 static void ebus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t)); 112 static void ebus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 113 bus_size_t, int)); 114 int ebus_dmamem_alloc __P((bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t, 115 bus_dma_segment_t *, int, int *, int)); 116 void ebus_dmamem_free __P((bus_dma_tag_t, bus_dma_segment_t *, int)); 117 int ebus_dmamem_map __P((bus_dma_tag_t, bus_dma_segment_t *, int, size_t, 118 caddr_t *, int)); 119 void ebus_dmamem_unmap __P((bus_dma_tag_t, caddr_t, size_t)); 120 121 int 122 ebus_match(parent, match, aux) 123 struct device *parent; 124 struct cfdata *match; 125 void *aux; 126 { 127 struct pci_attach_args *pa = aux; 128 int node; 129 130 /* Only attach if there's a PROM node. */ 131 node = PCITAG_NODE(pa->pa_tag); 132 if (node == -1) return (0); 133 134 /* Match a real ebus */ 135 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 136 PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN && 137 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUS) 138 return (1); 139 140 /* Or a PCI-ISA bridge XXX I hope this is on-board. */ 141 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 142 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) { 143 return (1); 144 } 145 146 return (0); 147 } 148 149 /* 150 * attach an ebus and all it's children. this code is modeled 151 * after the sbus code which does similar things. 152 */ 153 void 154 ebus_attach(parent, self, aux) 155 struct device *parent, *self; 156 void *aux; 157 { 158 struct ebus_softc *sc = (struct ebus_softc *)self; 159 struct pci_attach_args *pa = aux; 160 struct ebus_attach_args eba; 161 struct ebus_interrupt_map_mask *immp; 162 int node, nmapmask, error; 163 char devinfo[256]; 164 165 printf("\n"); 166 167 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo); 168 printf("%s: %s, revision 0x%02x\n", self->dv_xname, devinfo, 169 PCI_REVISION(pa->pa_class)); 170 171 sc->sc_parent = (struct psycho_softc *)parent; 172 sc->sc_memtag = pa->pa_memt; 173 sc->sc_iotag = pa->pa_iot; 174 sc->sc_childbustag = ebus_alloc_bus_tag(sc, PCI_MEMORY_BUS_SPACE); 175 sc->sc_dmatag = ebus_alloc_dma_tag(sc, pa->pa_dmat); 176 177 node = PCITAG_NODE(pa->pa_tag); 178 if (node == -1) 179 panic("could not find ebus node"); 180 181 sc->sc_node = node; 182 183 /* 184 * fill in our softc with information from the prom 185 */ 186 sc->sc_intmap = NULL; 187 sc->sc_range = NULL; 188 error = getprop(node, "interrupt-map", 189 sizeof(struct ebus_interrupt_map), 190 &sc->sc_nintmap, (void **)&sc->sc_intmap); 191 switch (error) { 192 case 0: 193 immp = &sc->sc_intmapmask; 194 error = getprop(node, "interrupt-map-mask", 195 sizeof(struct ebus_interrupt_map_mask), &nmapmask, 196 (void **)&immp); 197 if (error) 198 panic("could not get ebus interrupt-map-mask"); 199 if (nmapmask != 1) 200 panic("ebus interrupt-map-mask is broken"); 201 break; 202 case ENOENT: 203 break; 204 default: 205 panic("ebus interrupt-map: error %d", error); 206 break; 207 } 208 209 error = getprop(node, "ranges", sizeof(struct ebus_ranges), 210 &sc->sc_nrange, (void **)&sc->sc_range); 211 if (error) 212 panic("ebus ranges: error %d", error); 213 214 /* 215 * now attach all our children 216 */ 217 DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node)); 218 for (node = firstchild(node); node; node = nextsibling(node)) { 219 char *name = getpropstring(node, "name"); 220 221 if (ebus_setup_attach_args(sc, node, &eba) != 0) { 222 printf("ebus_attach: %s: incomplete\n", name); 223 continue; 224 } else { 225 DPRINTF(EDB_CHILD, ("- found child `%s', attaching\n", 226 eba.ea_name)); 227 (void)config_found(self, &eba, ebus_print); 228 } 229 ebus_destroy_attach_args(&eba); 230 } 231 } 232 233 int 234 ebus_setup_attach_args(sc, node, ea) 235 struct ebus_softc *sc; 236 int node; 237 struct ebus_attach_args *ea; 238 { 239 int n, rv; 240 241 bzero(ea, sizeof(struct ebus_attach_args)); 242 rv = getprop(node, "name", 1, &n, (void **)&ea->ea_name); 243 if (rv != 0) 244 return (rv); 245 ea->ea_name[n] = '\0'; 246 247 ea->ea_node = node; 248 ea->ea_bustag = sc->sc_childbustag; 249 ea->ea_dmatag = sc->sc_dmatag; 250 251 rv = getprop(node, "reg", sizeof(struct ebus_regs), &ea->ea_nregs, 252 (void **)&ea->ea_regs); 253 if (rv) 254 return (rv); 255 256 rv = getprop(node, "address", sizeof(u_int32_t), &ea->ea_nvaddrs, 257 (void **)&ea->ea_vaddrs); 258 if (rv != ENOENT) { 259 if (rv) 260 return (rv); 261 262 if (ea->ea_nregs != ea->ea_nvaddrs) 263 printf("ebus loses: device %s: %d regs and %d addrs\n", 264 ea->ea_name, ea->ea_nregs, ea->ea_nvaddrs); 265 } else 266 ea->ea_nvaddrs = 0; 267 268 if (getprop(node, "interrupts", sizeof(u_int32_t), &ea->ea_nintrs, 269 (void **)&ea->ea_intrs)) 270 ea->ea_nintrs = 0; 271 else 272 ebus_find_ino(sc, ea); 273 274 return (0); 275 } 276 277 void 278 ebus_destroy_attach_args(ea) 279 struct ebus_attach_args *ea; 280 { 281 282 if (ea->ea_name) 283 free((void *)ea->ea_name, M_DEVBUF); 284 if (ea->ea_regs) 285 free((void *)ea->ea_regs, M_DEVBUF); 286 if (ea->ea_intrs) 287 free((void *)ea->ea_intrs, M_DEVBUF); 288 if (ea->ea_vaddrs) 289 free((void *)ea->ea_vaddrs, M_DEVBUF); 290 } 291 292 int 293 ebus_print(aux, p) 294 void *aux; 295 const char *p; 296 { 297 struct ebus_attach_args *ea = aux; 298 int i; 299 300 if (p) 301 printf("%s at %s", ea->ea_name, p); 302 for (i = 0; i < ea->ea_nregs; i++) 303 printf("%s %x-%x", i == 0 ? " addr" : ",", 304 ea->ea_regs[i].lo, 305 ea->ea_regs[i].lo + ea->ea_regs[i].size - 1); 306 for (i = 0; i < ea->ea_nintrs; i++) 307 printf(" ipl %d", ea->ea_intrs[i]); 308 return (UNCONF); 309 } 310 311 312 /* 313 * find the INO values for each interrupt and fill them in. 314 * 315 * for each "reg" property of this device, mask it's hi and lo 316 * values with the "interrupt-map-mask"'s hi/lo values, and also 317 * mask the interrupt number with the interrupt mask. search the 318 * "interrupt-map" list for matching values of hi, lo and interrupt 319 * to give the INO for this interrupt. 320 */ 321 void 322 ebus_find_ino(sc, ea) 323 struct ebus_softc *sc; 324 struct ebus_attach_args *ea; 325 { 326 u_int32_t hi, lo, intr; 327 int i, j, k; 328 329 if (sc->sc_nintmap == 0) { 330 for (i = 0; i < ea->ea_nintrs; i++) { 331 OF_mapintr(ea->ea_node, &ea->ea_intrs[i], 332 sizeof(ea->ea_intrs[0]), 333 sizeof(ea->ea_intrs[0])); 334 } 335 return; 336 } 337 338 DPRINTF(EDB_INTRMAP, 339 ("ebus_find_ino: searching %d interrupts", ea->ea_nintrs)); 340 341 for (j = 0; j < ea->ea_nintrs; j++) { 342 343 intr = ea->ea_intrs[j] & sc->sc_intmapmask.intr; 344 345 DPRINTF(EDB_INTRMAP, 346 ("; intr %x masked to %x", ea->ea_intrs[j], intr)); 347 for (i = 0; i < ea->ea_nregs; i++) { 348 hi = ea->ea_regs[i].hi & sc->sc_intmapmask.hi; 349 lo = ea->ea_regs[i].lo & sc->sc_intmapmask.lo; 350 351 DPRINTF(EDB_INTRMAP, 352 ("; reg hi.lo %08x.%08x masked to %08x.%08x", 353 ea->ea_regs[i].hi, ea->ea_regs[i].lo, hi, lo)); 354 for (k = 0; k < sc->sc_nintmap; k++) { 355 DPRINTF(EDB_INTRMAP, 356 ("; checking hi.lo %08x.%08x intr %x", 357 sc->sc_intmap[k].hi, sc->sc_intmap[k].lo, 358 sc->sc_intmap[k].intr)); 359 if (hi == sc->sc_intmap[k].hi && 360 lo == sc->sc_intmap[k].lo && 361 intr == sc->sc_intmap[k].intr) { 362 ea->ea_intrs[j] = 363 sc->sc_intmap[k].cintr; 364 DPRINTF(EDB_INTRMAP, 365 ("; FOUND IT! changing to %d\n", 366 sc->sc_intmap[k].cintr)); 367 goto next_intr; 368 } 369 } 370 } 371 next_intr:; 372 } 373 } 374 375 376 /* 377 * bus space and bus dma below here 378 */ 379 bus_space_tag_t 380 ebus_alloc_bus_tag(sc, type) 381 struct ebus_softc *sc; 382 int type; 383 { 384 bus_space_tag_t bt; 385 386 bt = (bus_space_tag_t) 387 malloc(sizeof(struct sparc_bus_space_tag), M_DEVBUF, M_NOWAIT); 388 if (bt == NULL) 389 panic("could not allocate ebus bus tag"); 390 391 bzero(bt, sizeof *bt); 392 bt->cookie = sc; 393 bt->parent = sc->sc_memtag; 394 bt->type = type; 395 bt->sparc_bus_map = _ebus_bus_map; 396 bt->sparc_bus_mmap = ebus_bus_mmap; 397 bt->sparc_intr_establish = ebus_intr_establish; 398 return (bt); 399 } 400 401 /* XXX? */ 402 bus_dma_tag_t 403 ebus_alloc_dma_tag(sc, pdt) 404 struct ebus_softc *sc; 405 bus_dma_tag_t pdt; 406 { 407 bus_dma_tag_t dt; 408 409 dt = (bus_dma_tag_t) 410 malloc(sizeof(struct sparc_bus_dma_tag), M_DEVBUF, M_NOWAIT); 411 if (dt == NULL) 412 panic("could not allocate ebus dma tag"); 413 414 bzero(dt, sizeof *dt); 415 dt->_cookie = sc; 416 dt->_parent = pdt; 417 #define PCOPY(x) dt->x = pdt->x 418 PCOPY(_dmamap_create); 419 PCOPY(_dmamap_destroy); 420 dt->_dmamap_load = ebus_dmamap_load; 421 PCOPY(_dmamap_load_mbuf); 422 PCOPY(_dmamap_load_uio); 423 PCOPY(_dmamap_load_raw); 424 dt->_dmamap_unload = ebus_dmamap_unload; 425 dt->_dmamap_sync = ebus_dmamap_sync; 426 dt->_dmamem_alloc = ebus_dmamem_alloc; 427 dt->_dmamem_free = ebus_dmamem_free; 428 dt->_dmamem_map = ebus_dmamem_map; 429 dt->_dmamem_unmap = ebus_dmamem_unmap; 430 PCOPY(_dmamem_mmap); 431 #undef PCOPY 432 return (dt); 433 } 434 435 /* 436 * bus space support. <sparc64/dev/psychoreg.h> has a discussion 437 * about PCI physical addresses, which also applies to ebus. 438 */ 439 static int 440 _ebus_bus_map(t, btype, offset, size, flags, vaddr, hp) 441 bus_space_tag_t t; 442 bus_type_t btype; 443 bus_addr_t offset; 444 bus_size_t size; 445 int flags; 446 vaddr_t vaddr; 447 bus_space_handle_t *hp; 448 { 449 struct ebus_softc *sc = t->cookie; 450 bus_addr_t hi, lo; 451 int i, ss; 452 453 DPRINTF(EDB_BUSMAP, 454 ("\n_ebus_bus_map: type %d off %016llx sz %x flags %d va %p", 455 (int)t->type, (unsigned long long)offset, (int)size, (int)flags, 456 (void *)vaddr)); 457 458 hi = offset >> 32UL; 459 lo = offset & 0xffffffff; 460 DPRINTF(EDB_BUSMAP, (" (hi %08x lo %08x)", (u_int)hi, (u_int)lo)); 461 for (i = 0; i < sc->sc_nrange; i++) { 462 bus_addr_t pciaddr; 463 464 if (hi != sc->sc_range[i].child_hi) 465 continue; 466 if (lo < sc->sc_range[i].child_lo || 467 (lo + size) > 468 (sc->sc_range[i].child_lo + sc->sc_range[i].size)) 469 continue; 470 471 /* Isolate address space and find the right tag */ 472 ss = (sc->sc_range[i].phys_hi>>24)&3; 473 switch (ss) { 474 case 1: /* I/O space */ 475 t = sc->sc_iotag; 476 break; 477 case 2: /* Memory space */ 478 t = sc->sc_memtag; 479 break; 480 case 0: /* Config space */ 481 case 3: /* 64-bit Memory space */ 482 default: /* WTF? */ 483 /* We don't handle these */ 484 panic("_ebus_bus_map: illegal space %x", ss); 485 break; 486 } 487 pciaddr = ((bus_addr_t)sc->sc_range[i].phys_mid << 32UL) | 488 sc->sc_range[i].phys_lo; 489 pciaddr += lo; 490 DPRINTF(EDB_BUSMAP, 491 ("\n_ebus_bus_map: mapping space %x paddr offset %qx pciaddr %qx\n", 492 ss, (unsigned long long)offset, (unsigned long long)pciaddr)); 493 /* pass it onto the psycho */ 494 return (bus_space_map2(t, sc->sc_range[i].phys_hi, 495 pciaddr, size, flags, vaddr, hp)); 496 } 497 DPRINTF(EDB_BUSMAP, (": FAILED\n")); 498 return (EINVAL); 499 } 500 501 static int 502 ebus_bus_mmap(t, btype, paddr, flags, hp) 503 bus_space_tag_t t; 504 bus_type_t btype; 505 bus_addr_t paddr; 506 int flags; 507 bus_space_handle_t *hp; 508 { 509 bus_addr_t offset = paddr; 510 struct ebus_softc *sc = t->cookie; 511 int i; 512 513 for (i = 0; i < sc->sc_nrange; i++) { 514 bus_addr_t paddr = ((bus_addr_t)sc->sc_range[i].child_hi << 32) | 515 sc->sc_range[i].child_lo; 516 517 if (offset != paddr) 518 continue; 519 520 DPRINTF(EDB_BUSMAP, ("\n_ebus_bus_mmap: mapping paddr %qx\n", 521 (unsigned long long)paddr)); 522 return (bus_space_mmap(sc->sc_memtag, 0, paddr, 523 flags, hp)); 524 } 525 526 return (-1); 527 } 528 529 /* 530 * install an interrupt handler for a PCI device 531 */ 532 void * 533 ebus_intr_establish(t, pri, level, flags, handler, arg) 534 bus_space_tag_t t; 535 int pri; 536 int level; 537 int flags; 538 int (*handler) __P((void *)); 539 void *arg; 540 { 541 return (bus_intr_establish(t->parent, pri, level, flags, handler, arg)); 542 } 543 544 /* 545 * bus dma support 546 */ 547 int 548 ebus_dmamap_load(t, map, buf, buflen, p, flags) 549 bus_dma_tag_t t; 550 bus_dmamap_t map; 551 void *buf; 552 bus_size_t buflen; 553 struct proc *p; 554 int flags; 555 { 556 struct ebus_softc *sc = t->_cookie; 557 558 return (iommu_dvmamap_load(t, sc->sc_parent->sc_is, map, buf, buflen, 559 p, flags)); 560 } 561 562 void 563 ebus_dmamap_unload(t, map) 564 bus_dma_tag_t t; 565 bus_dmamap_t map; 566 { 567 struct ebus_softc *sc = t->_cookie; 568 569 iommu_dvmamap_unload(t, sc->sc_parent->sc_is, map); 570 } 571 572 void 573 ebus_dmamap_sync(t, map, offset, len, ops) 574 bus_dma_tag_t t; 575 bus_dmamap_t map; 576 bus_addr_t offset; 577 bus_size_t len; 578 int ops; 579 { 580 struct ebus_softc *sc = t->_cookie; 581 582 iommu_dvmamap_sync(t, sc->sc_parent->sc_is, map, offset, len, ops); 583 bus_dmamap_sync(t->_parent, map, offset, len, ops); 584 } 585 586 int 587 ebus_dmamem_alloc(t, size, alignment, boundary, segs, nsegs, rsegs, flags) 588 bus_dma_tag_t t; 589 bus_size_t size; 590 bus_size_t alignment; 591 bus_size_t boundary; 592 bus_dma_segment_t *segs; 593 int nsegs; 594 int *rsegs; 595 int flags; 596 { 597 struct ebus_softc *sc = t->_cookie; 598 599 return (iommu_dvmamem_alloc(t, sc->sc_parent->sc_is, size, alignment, 600 boundary, segs, nsegs, rsegs, flags)); 601 } 602 603 void 604 ebus_dmamem_free(t, segs, nsegs) 605 bus_dma_tag_t t; 606 bus_dma_segment_t *segs; 607 int nsegs; 608 { 609 struct ebus_softc *sc = t->_cookie; 610 611 iommu_dvmamem_free(t, sc->sc_parent->sc_is, segs, nsegs); 612 } 613 614 int 615 ebus_dmamem_map(t, segs, nsegs, size, kvap, flags) 616 bus_dma_tag_t t; 617 bus_dma_segment_t *segs; 618 int nsegs; 619 size_t size; 620 caddr_t *kvap; 621 int flags; 622 { 623 struct ebus_softc *sc = t->_cookie; 624 625 return (iommu_dvmamem_map(t, sc->sc_parent->sc_is, segs, nsegs, 626 size, kvap, flags)); 627 } 628 629 void 630 ebus_dmamem_unmap(t, kva, size) 631 bus_dma_tag_t t; 632 caddr_t kva; 633 size_t size; 634 { 635 struct ebus_softc *sc = t->_cookie; 636 637 iommu_dvmamem_unmap(t, sc->sc_parent->sc_is, kva, size); 638 } 639
Indexes created Sat Sep 27 14:09:57 GMT 2025