ebus.c revision 1.41
1 /* $NetBSD: ebus.c,v 1.41 2003/08/27 15:59:54 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1999, 2000, 2001 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 <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: ebus.c,v 1.41 2003/08/27 15:59:54 mrg Exp $"); 33 34 #include "opt_ddb.h" 35 36 /* 37 * UltraSPARC 5 and beyond ebus support. 38 * 39 * note that this driver is not complete: 40 * - interrupt establish is written and appears to work 41 * - bus map code is written and appears to work 42 * - ebus2 DMA code is completely unwritten, we just punt to 43 * the iommu. 44 */ 45 46 #ifdef DEBUG 47 #define EDB_PROM 0x01 48 #define EDB_CHILD 0x02 49 #define EDB_INTRMAP 0x04 50 #define EDB_BUSMAP 0x08 51 int ebus_debug = 0; 52 #define DPRINTF(l, s) do { if (ebus_debug & l) printf s; } while (0) 53 #else 54 #define DPRINTF(l, s) 55 #endif 56 57 #include <sys/param.h> 58 #include <sys/conf.h> 59 #include <sys/device.h> 60 #include <sys/errno.h> 61 #include <sys/extent.h> 62 #include <sys/malloc.h> 63 #include <sys/systm.h> 64 #include <sys/time.h> 65 66 #define _SPARC_BUS_DMA_PRIVATE 67 #include <machine/bus.h> 68 #include <machine/autoconf.h> 69 #include <machine/openfirm.h> 70 71 #include <dev/pci/pcivar.h> 72 #include <dev/pci/pcireg.h> 73 #include <dev/pci/pcidevs.h> 74 75 #include <sparc64/dev/iommureg.h> 76 #include <sparc64/dev/iommuvar.h> 77 #include <sparc64/dev/psychoreg.h> 78 #include <sparc64/dev/psychovar.h> 79 #include <dev/ebus/ebusreg.h> 80 #include <dev/ebus/ebusvar.h> 81 #include <sparc64/sparc64/cache.h> 82 83 struct ebus_softc { 84 struct device sc_dev; 85 86 int sc_node; 87 88 bus_space_tag_t sc_memtag; /* from pci */ 89 bus_space_tag_t sc_iotag; /* from pci */ 90 bus_space_tag_t sc_childbustag; /* pass to children */ 91 bus_dma_tag_t sc_dmatag; 92 93 struct ebus_ranges *sc_range; 94 struct ebus_interrupt_map *sc_intmap; 95 struct ebus_interrupt_map_mask sc_intmapmask; 96 97 int sc_nrange; /* counters */ 98 int sc_nintmap; 99 }; 100 101 int ebus_match __P((struct device *, struct cfdata *, void *)); 102 void ebus_attach __P((struct device *, struct device *, void *)); 103 104 CFATTACH_DECL(ebus, sizeof(struct ebus_softc), 105 ebus_match, ebus_attach, NULL, NULL); 106 107 bus_space_tag_t ebus_alloc_bus_tag __P((struct ebus_softc *, int)); 108 109 int ebus_setup_attach_args __P((struct ebus_softc *, int, 110 struct ebus_attach_args *)); 111 void ebus_destroy_attach_args __P((struct ebus_attach_args *)); 112 int ebus_print __P((void *, const char *)); 113 void ebus_find_ino __P((struct ebus_softc *, struct ebus_attach_args *)); 114 int ebus_find_node __P((struct pci_attach_args *)); 115 116 /* 117 * here are our bus space and bus DMA routines. 118 */ 119 static paddr_t ebus_bus_mmap __P((bus_space_tag_t, bus_addr_t, off_t, int, int)); 120 static int _ebus_bus_map __P((bus_space_tag_t, bus_addr_t, bus_size_t, int, 121 vaddr_t, bus_space_handle_t *)); 122 static void *ebus_intr_establish __P((bus_space_tag_t, int, int, 123 int (*) __P((void *)), void *, void(*)__P((void)))); 124 125 int 126 ebus_match(parent, match, aux) 127 struct device *parent; 128 struct cfdata *match; 129 void *aux; 130 { 131 struct pci_attach_args *pa = aux; 132 char name[10]; 133 int node; 134 135 /* Only attach if there's a PROM node. */ 136 node = PCITAG_NODE(pa->pa_tag); 137 if (node == -1) return (0); 138 139 /* Match a real ebus */ 140 OF_getprop(node, "name", &name, sizeof(name)); 141 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 142 PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN && 143 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUS && 144 strcmp(name, "ebus") == 0) 145 return (1); 146 147 /* Or a real ebus III */ 148 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 149 PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN && 150 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUSIII && 151 strcmp(name, "ebus") == 0) 152 return (1); 153 154 /* Or a PCI-ISA bridge XXX I hope this is on-board. */ 155 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 156 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) { 157 return (1); 158 } 159 160 return (0); 161 } 162 163 /* 164 * attach an ebus and all it's children. this code is modeled 165 * after the sbus code which does similar things. 166 */ 167 void 168 ebus_attach(parent, self, aux) 169 struct device *parent, *self; 170 void *aux; 171 { 172 struct ebus_softc *sc = (struct ebus_softc *)self; 173 struct pci_attach_args *pa = aux; 174 struct ebus_attach_args eba; 175 struct ebus_interrupt_map_mask *immp; 176 int node, nmapmask, error; 177 char devinfo[256]; 178 179 printf("\n"); 180 181 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo); 182 printf("%s: %s, revision 0x%02x\n", self->dv_xname, devinfo, 183 PCI_REVISION(pa->pa_class)); 184 185 sc->sc_memtag = pa->pa_memt; 186 sc->sc_iotag = pa->pa_iot; 187 sc->sc_childbustag = ebus_alloc_bus_tag(sc, PCI_MEMORY_BUS_SPACE); 188 sc->sc_dmatag = pa->pa_dmat; 189 190 node = PCITAG_NODE(pa->pa_tag); 191 if (node == -1) 192 panic("could not find ebus node"); 193 194 sc->sc_node = node; 195 196 /* 197 * fill in our softc with information from the prom 198 */ 199 sc->sc_intmap = NULL; 200 sc->sc_range = NULL; 201 error = PROM_getprop(node, "interrupt-map", 202 sizeof(struct ebus_interrupt_map), 203 &sc->sc_nintmap, &sc->sc_intmap); 204 switch (error) { 205 case 0: 206 immp = &sc->sc_intmapmask; 207 error = PROM_getprop(node, "interrupt-map-mask", 208 sizeof(struct ebus_interrupt_map_mask), &nmapmask, 209 &immp); 210 if (error) 211 panic("could not get ebus interrupt-map-mask"); 212 if (nmapmask != 1) 213 panic("ebus interrupt-map-mask is broken"); 214 break; 215 case ENOENT: 216 break; 217 default: 218 panic("ebus interrupt-map: error %d", error); 219 break; 220 } 221 222 error = PROM_getprop(node, "ranges", sizeof(struct ebus_ranges), 223 &sc->sc_nrange, &sc->sc_range); 224 if (error) 225 panic("ebus ranges: error %d", error); 226 227 /* 228 * now attach all our children 229 */ 230 DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node)); 231 for (node = firstchild(node); node; node = nextsibling(node)) { 232 char *name = PROM_getpropstring(node, "name"); 233 234 if (ebus_setup_attach_args(sc, node, &eba) != 0) { 235 printf("ebus_attach: %s: incomplete\n", name); 236 continue; 237 } else { 238 DPRINTF(EDB_CHILD, ("- found child `%s', attaching\n", 239 eba.ea_name)); 240 (void)config_found(self, &eba, ebus_print); 241 } 242 ebus_destroy_attach_args(&eba); 243 } 244 } 245 246 int 247 ebus_setup_attach_args(sc, node, ea) 248 struct ebus_softc *sc; 249 int node; 250 struct ebus_attach_args *ea; 251 { 252 int n, rv; 253 254 bzero(ea, sizeof(struct ebus_attach_args)); 255 rv = PROM_getprop(node, "name", 1, &n, &ea->ea_name); 256 if (rv != 0) 257 return (rv); 258 ea->ea_name[n] = '\0'; 259 260 ea->ea_node = node; 261 ea->ea_bustag = sc->sc_childbustag; 262 ea->ea_dmatag = sc->sc_dmatag; 263 264 rv = PROM_getprop(node, "reg", sizeof(struct ebus_regs), &ea->ea_nreg, 265 &ea->ea_reg); 266 if (rv) 267 return (rv); 268 269 rv = PROM_getprop(node, "address", sizeof(u_int32_t), &ea->ea_nvaddr, 270 &ea->ea_vaddr); 271 if (rv != ENOENT) { 272 if (rv) 273 return (rv); 274 275 if (ea->ea_nreg != ea->ea_nvaddr) 276 printf("ebus loses: device %s: %d regs and %d addrs\n", 277 ea->ea_name, ea->ea_nreg, ea->ea_nvaddr); 278 } else 279 ea->ea_nvaddr = 0; 280 281 if (PROM_getprop(node, "interrupts", sizeof(u_int32_t), &ea->ea_nintr, 282 &ea->ea_intr)) 283 ea->ea_nintr = 0; 284 else 285 ebus_find_ino(sc, ea); 286 287 return (0); 288 } 289 290 void 291 ebus_destroy_attach_args(ea) 292 struct ebus_attach_args *ea; 293 { 294 295 if (ea->ea_name) 296 free((void *)ea->ea_name, M_DEVBUF); 297 if (ea->ea_reg) 298 free((void *)ea->ea_reg, M_DEVBUF); 299 if (ea->ea_intr) 300 free((void *)ea->ea_intr, M_DEVBUF); 301 if (ea->ea_vaddr) 302 free((void *)ea->ea_vaddr, M_DEVBUF); 303 } 304 305 int 306 ebus_print(aux, p) 307 void *aux; 308 const char *p; 309 { 310 struct ebus_attach_args *ea = aux; 311 int i; 312 313 if (p) 314 aprint_normal("%s at %s", ea->ea_name, p); 315 for (i = 0; i < ea->ea_nreg; i++) 316 aprint_normal("%s %x-%x", i == 0 ? " addr" : ",", 317 ea->ea_reg[i].lo, 318 ea->ea_reg[i].lo + ea->ea_reg[i].size - 1); 319 for (i = 0; i < ea->ea_nintr; i++) 320 aprint_normal(" ipl %d", ea->ea_intr[i]); 321 return (UNCONF); 322 } 323 324 325 /* 326 * find the INO values for each interrupt and fill them in. 327 * 328 * for each "reg" property of this device, mask it's hi and lo 329 * values with the "interrupt-map-mask"'s hi/lo values, and also 330 * mask the interrupt number with the interrupt mask. search the 331 * "interrupt-map" list for matching values of hi, lo and interrupt 332 * to give the INO for this interrupt. 333 */ 334 void 335 ebus_find_ino(sc, ea) 336 struct ebus_softc *sc; 337 struct ebus_attach_args *ea; 338 { 339 u_int32_t hi, lo, intr; 340 int i, j, k; 341 342 if (sc->sc_nintmap == 0) { 343 for (i = 0; i < ea->ea_nintr; i++) { 344 OF_mapintr(ea->ea_node, &ea->ea_intr[i], 345 sizeof(ea->ea_intr[0]), 346 sizeof(ea->ea_intr[0])); 347 } 348 return; 349 } 350 351 DPRINTF(EDB_INTRMAP, 352 ("ebus_find_ino: searching %d interrupts", ea->ea_nintr)); 353 354 for (j = 0; j < ea->ea_nintr; j++) { 355 356 intr = ea->ea_intr[j] & sc->sc_intmapmask.intr; 357 358 DPRINTF(EDB_INTRMAP, 359 ("; intr %x masked to %x", ea->ea_intr[j], intr)); 360 for (i = 0; i < ea->ea_nreg; i++) { 361 hi = ea->ea_reg[i].hi & sc->sc_intmapmask.hi; 362 lo = ea->ea_reg[i].lo & sc->sc_intmapmask.lo; 363 364 DPRINTF(EDB_INTRMAP, 365 ("; reg hi.lo %08x.%08x masked to %08x.%08x", 366 ea->ea_reg[i].hi, ea->ea_reg[i].lo, hi, lo)); 367 for (k = 0; k < sc->sc_nintmap; k++) { 368 DPRINTF(EDB_INTRMAP, 369 ("; checking hi.lo %08x.%08x intr %x", 370 sc->sc_intmap[k].hi, sc->sc_intmap[k].lo, 371 sc->sc_intmap[k].intr)); 372 if (hi == sc->sc_intmap[k].hi && 373 lo == sc->sc_intmap[k].lo && 374 intr == sc->sc_intmap[k].intr) { 375 ea->ea_intr[j] = 376 sc->sc_intmap[k].cintr; 377 DPRINTF(EDB_INTRMAP, 378 ("; FOUND IT! changing to %d\n", 379 sc->sc_intmap[k].cintr)); 380 goto next_intr; 381 } 382 } 383 } 384 next_intr:; 385 } 386 } 387 388 /* 389 * bus space support. <sparc64/dev/psychoreg.h> has a discussion 390 * about PCI physical addresses, which also applies to ebus. 391 */ 392 bus_space_tag_t 393 ebus_alloc_bus_tag(sc, type) 394 struct ebus_softc *sc; 395 int type; 396 { 397 bus_space_tag_t bt; 398 399 bt = (bus_space_tag_t) 400 malloc(sizeof(struct sparc_bus_space_tag), M_DEVBUF, M_NOWAIT); 401 if (bt == NULL) 402 panic("could not allocate ebus bus tag"); 403 404 bzero(bt, sizeof *bt); 405 bt->cookie = sc; 406 bt->parent = sc->sc_memtag; 407 bt->type = type; 408 bt->sparc_bus_map = _ebus_bus_map; 409 bt->sparc_bus_mmap = ebus_bus_mmap; 410 bt->sparc_intr_establish = ebus_intr_establish; 411 return (bt); 412 } 413 414 static int 415 _ebus_bus_map(t, ba, size, flags, va, hp) 416 bus_space_tag_t t; 417 bus_addr_t ba; 418 bus_size_t size; 419 int flags; 420 vaddr_t va; 421 bus_space_handle_t *hp; 422 { 423 struct ebus_softc *sc = t->cookie; 424 paddr_t offset; 425 u_int bar; 426 int i, ss; 427 428 bar = BUS_ADDR_IOSPACE(ba); 429 offset = BUS_ADDR_PADDR(ba); 430 431 DPRINTF(EDB_BUSMAP, 432 ("\n_ebus_bus_map: bar %d offset %08x sz %x flags %x va %p\n", 433 (int)bar, (u_int32_t)offset, (u_int32_t)size, 434 flags, (void *)va)); 435 436 for (i = 0; i < sc->sc_nrange; i++) { 437 bus_addr_t pciaddr; 438 439 if (bar != sc->sc_range[i].child_hi) 440 continue; 441 if (offset < sc->sc_range[i].child_lo || 442 (offset + size) > 443 (sc->sc_range[i].child_lo + sc->sc_range[i].size)) 444 continue; 445 446 /* Isolate address space and find the right tag */ 447 ss = (sc->sc_range[i].phys_hi>>24)&3; 448 switch (ss) { 449 case 1: /* I/O space */ 450 t = sc->sc_iotag; 451 break; 452 case 2: /* Memory space */ 453 t = sc->sc_memtag; 454 break; 455 case 0: /* Config space */ 456 case 3: /* 64-bit Memory space */ 457 default: /* WTF? */ 458 /* We don't handle these */ 459 panic("_ebus_bus_map: illegal space %x", ss); 460 break; 461 } 462 pciaddr = ((bus_addr_t)sc->sc_range[i].phys_mid << 32UL) | 463 sc->sc_range[i].phys_lo; 464 pciaddr += offset; 465 466 DPRINTF(EDB_BUSMAP, 467 ("_ebus_bus_map: mapping to PCI addr %x\n", 468 (u_int32_t)pciaddr)); 469 470 /* pass it onto the psycho */ 471 return (bus_space_map(t, pciaddr, size, flags, hp)); 472 } 473 DPRINTF(EDB_BUSMAP, (": FAILED\n")); 474 return (EINVAL); 475 } 476 477 static paddr_t 478 ebus_bus_mmap(t, paddr, off, prot, flags) 479 bus_space_tag_t t; 480 bus_addr_t paddr; 481 off_t off; 482 int prot; 483 int flags; 484 { 485 bus_addr_t offset = paddr; 486 struct ebus_softc *sc = t->cookie; 487 int i; 488 489 for (i = 0; i < sc->sc_nrange; i++) { 490 bus_addr_t paddr = ((bus_addr_t)sc->sc_range[i].child_hi << 32) | 491 sc->sc_range[i].child_lo; 492 493 if (offset != paddr) 494 continue; 495 496 DPRINTF(EDB_BUSMAP, ("\n_ebus_bus_mmap: mapping paddr %qx\n", 497 (unsigned long long)paddr)); 498 return (bus_space_mmap(sc->sc_memtag, paddr, off, 499 prot, flags)); 500 } 501 502 return (-1); 503 } 504 505 /* 506 * install an interrupt handler for a ebus device 507 */ 508 void * 509 ebus_intr_establish(t, pri, level, handler, arg, fastvec) 510 bus_space_tag_t t; 511 int pri; 512 int level; 513 int (*handler) __P((void *)); 514 void *arg; 515 void (*fastvec) __P((void)); /* ignored */ 516 { 517 518 return (bus_intr_establish(t->parent, pri, level, handler, arg)); 519 } 520
Indexes created Mon Sep 29 21:09:56 GMT 2025