1 /* $NetBSD: ebus.c,v 1.60 2012/01/30 04:25:15 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: ebus.c,v 1.60 2012/01/30 04:25:15 mrg Exp $"); 31 32 #include "opt_ddb.h" 33 34 /* 35 * UltraSPARC 5 and beyond ebus support. 36 * 37 * note that this driver is not complete: 38 * - interrupt establish is written and appears to work 39 * - bus map code is written and appears to work 40 * - ebus2 DMA code is completely unwritten, we just punt to 41 * the iommu. 42 */ 43 44 #ifdef DEBUG 45 #define EDB_PROM 0x01 46 #define EDB_CHILD 0x02 47 #define EDB_INTRMAP 0x04 48 #define EDB_BUSMAP 0x08 49 #define EDB_BUSDMA 0x10 50 #define EDB_INTR 0x20 51 int ebus_debug = 0x0; 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 <sys/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 <dev/ebus/ebusreg.h> 76 #include <dev/ebus/ebusvar.h> 77 #include <sparc64/dev/ebusvar.h> 78 79 int ebus_match(device_t, cfdata_t, void *); 80 void ebus_attach(device_t, device_t, void *); 81 82 CFATTACH_DECL_NEW(ebus, sizeof(struct ebus_softc), 83 ebus_match, ebus_attach, NULL, NULL); 84 85 /* 86 * here are our bus space and bus DMA routines. 87 */ 88 static int _ebus_bus_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, vaddr_t, 89 bus_space_handle_t *); 90 static void *ebus_intr_establish(bus_space_tag_t, int, int, int (*)(void *), 91 void *, void(*)(void)); 92 93 int 94 ebus_match(device_t parent, cfdata_t match, void *aux) 95 { 96 struct pci_attach_args *pa = aux; 97 char *name; 98 int node; 99 100 /* Only attach if there's a PROM node. */ 101 node = PCITAG_NODE(pa->pa_tag); 102 if (node == -1) 103 return (0); 104 105 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_BRIDGE) 106 return (0); 107 108 /* Match a real ebus */ 109 name = prom_getpropstring(node, "name"); 110 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN && 111 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUS && 112 strcmp(name, "ebus") == 0) 113 return (1); 114 115 /* Or a real ebus III */ 116 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN && 117 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUSIII && 118 strcmp(name, "ebus") == 0) 119 return (1); 120 121 /* Or a PCI-ISA bridge XXX I hope this is on-board. */ 122 if (PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) { 123 return (1); 124 } 125 126 return (0); 127 } 128 129 /* 130 * attach an ebus and all it's children. this code is modeled 131 * after the sbus code which does similar things. 132 */ 133 void 134 ebus_attach(device_t parent, device_t self, void *aux) 135 { 136 struct ebus_softc *sc = device_private(self); 137 struct pci_attach_args *pa = aux; 138 struct ebus_attach_args eba; 139 struct ebus_interrupt_map_mask *immp; 140 int node, nmapmask, error; 141 char devinfo[256]; 142 143 sc->sc_dev = self; 144 145 aprint_normal("\n"); 146 aprint_naive("\n"); 147 148 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 149 aprint_normal_dev(self, "%s, revision 0x%02x\n", devinfo, 150 PCI_REVISION(pa->pa_class)); 151 152 sc->sc_memtag = pa->pa_memt; 153 sc->sc_iotag = pa->pa_iot; 154 sc->sc_childbustag = ebus_alloc_bus_tag(sc, PCI_MEMORY_BUS_SPACE); 155 sc->sc_dmatag = pa->pa_dmat; 156 157 node = PCITAG_NODE(pa->pa_tag); 158 if (node == -1) 159 panic("could not find ebus node"); 160 161 sc->sc_node = node; 162 163 /* 164 * fill in our softc with information from the prom 165 */ 166 sc->sc_intmap = NULL; 167 sc->sc_range = NULL; 168 sc->sc_nintmap = 0; 169 error = prom_getprop(node, "interrupt-map", 170 sizeof(struct ebus_interrupt_map), 171 &sc->sc_nintmap, &sc->sc_intmap); 172 switch (error) { 173 case 0: 174 immp = &sc->sc_intmapmask; 175 nmapmask = sizeof(*immp); 176 error = prom_getprop(node, "interrupt-map-mask", 177 sizeof(struct ebus_interrupt_map_mask), &nmapmask, 178 &immp); 179 if (error) 180 panic("could not get ebus interrupt-map-mask, error %d", 181 error); 182 if (nmapmask != 1) 183 panic("ebus interrupt-map-mask is broken"); 184 break; 185 case ENOENT: 186 break; 187 default: 188 panic("ebus interrupt-map: error %d", error); 189 break; 190 } 191 192 error = prom_getprop(node, "ranges", sizeof(struct ebus_ranges), 193 &sc->sc_nrange, &sc->sc_range); 194 if (error) 195 panic("ebus ranges: error %d", error); 196 197 /* 198 * now attach all our children 199 */ 200 DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node)); 201 for (node = firstchild(node); node; node = nextsibling(node)) { 202 char *name = prom_getpropstring(node, "name"); 203 204 if (ebus_setup_attach_args(sc, node, &eba) != 0) { 205 aprint_error("ebus_attach: %s: incomplete\n", name); 206 continue; 207 } else { 208 DPRINTF(EDB_CHILD, ("- found child `%s', attaching\n", 209 eba.ea_name)); 210 (void)config_found(self, &eba, ebus_print); 211 } 212 ebus_destroy_attach_args(&eba); 213 } 214 } 215 216 int ebus_setup_attach_args(struct ebus_softc *, int, 217 struct ebus_attach_args *); 218 int 219 ebus_setup_attach_args(struct ebus_softc *sc, int node, 220 struct ebus_attach_args *ea) 221 { 222 int n, rv; 223 224 memset(ea, 0, sizeof(struct ebus_attach_args)); 225 n = 0; 226 rv = prom_getprop(node, "name", 1, &n, &ea->ea_name); 227 if (rv != 0) 228 return (rv); 229 KASSERT(ea->ea_name[n-1] == '\0'); 230 231 ea->ea_node = node; 232 ea->ea_bustag = sc->sc_childbustag; 233 ea->ea_dmatag = sc->sc_dmatag; 234 235 rv = prom_getprop(node, "reg", sizeof(struct ebus_regs), &ea->ea_nreg, 236 &ea->ea_reg); 237 if (rv) 238 return (rv); 239 240 rv = prom_getprop(node, "address", sizeof(uint32_t), &ea->ea_nvaddr, 241 &ea->ea_vaddr); 242 if (rv != ENOENT) { 243 if (rv) 244 return (rv); 245 246 if (ea->ea_nreg != ea->ea_nvaddr) 247 printf("ebus loses: device %s: %d regs and %d addrs\n", 248 ea->ea_name, ea->ea_nreg, ea->ea_nvaddr); 249 } else 250 ea->ea_nvaddr = 0; 251 252 if (prom_getprop(node, "interrupts", sizeof(uint32_t), &ea->ea_nintr, 253 &ea->ea_intr)) 254 ea->ea_nintr = 0; 255 else 256 ebus_find_ino(sc, ea); 257 258 return (0); 259 } 260 261 void 262 ebus_destroy_attach_args(struct ebus_attach_args *ea) 263 { 264 265 if (ea->ea_name) 266 free((void *)ea->ea_name, M_DEVBUF); 267 if (ea->ea_reg) 268 free((void *)ea->ea_reg, M_DEVBUF); 269 if (ea->ea_intr) 270 free((void *)ea->ea_intr, M_DEVBUF); 271 if (ea->ea_vaddr) 272 free((void *)ea->ea_vaddr, M_DEVBUF); 273 } 274 275 int 276 ebus_print(void *aux, const char *p) 277 { 278 struct ebus_attach_args *ea = aux; 279 int i; 280 281 if (p) 282 aprint_normal("%s at %s", ea->ea_name, p); 283 for (i = 0; i < ea->ea_nreg; i++) 284 aprint_normal("%s %x-%x", i == 0 ? " addr" : ",", 285 ea->ea_reg[i].lo, 286 ea->ea_reg[i].lo + ea->ea_reg[i].size - 1); 287 for (i = 0; i < ea->ea_nintr; i++) 288 aprint_normal(" ipl %x", ea->ea_intr[i]); 289 return (UNCONF); 290 } 291 292 293 /* 294 * find the INO values for each interrupt and fill them in. 295 * 296 * for each "reg" property of this device, mask it's hi and lo 297 * values with the "interrupt-map-mask"'s hi/lo values, and also 298 * mask the interrupt number with the interrupt mask. search the 299 * "interrupt-map" list for matching values of hi, lo and interrupt 300 * to give the INO for this interrupt. 301 */ 302 void 303 ebus_find_ino(struct ebus_softc *sc, struct ebus_attach_args *ea) 304 { 305 uint32_t hi, lo, intr; 306 int i, j, k; 307 308 if (sc->sc_nintmap == 0) { 309 for (i = 0; i < ea->ea_nintr; i++) { 310 OF_mapintr(ea->ea_node, &ea->ea_intr[i], 311 sizeof(ea->ea_intr[0]), 312 sizeof(ea->ea_intr[0])); 313 } 314 return; 315 } 316 317 DPRINTF(EDB_INTRMAP, 318 ("ebus_find_ino: searching %d interrupts", ea->ea_nintr)); 319 320 for (j = 0; j < ea->ea_nintr; j++) { 321 322 intr = ea->ea_intr[j] & sc->sc_intmapmask.intr; 323 324 DPRINTF(EDB_INTRMAP, 325 ("; intr %x masked to %x", ea->ea_intr[j], intr)); 326 for (i = 0; i < ea->ea_nreg; i++) { 327 hi = ea->ea_reg[i].hi & sc->sc_intmapmask.hi; 328 lo = ea->ea_reg[i].lo & sc->sc_intmapmask.lo; 329 330 DPRINTF(EDB_INTRMAP, 331 ("; reg hi.lo %08x.%08x masked to %08x.%08x", 332 ea->ea_reg[i].hi, ea->ea_reg[i].lo, hi, lo)); 333 for (k = 0; k < sc->sc_nintmap; k++) { 334 DPRINTF(EDB_INTRMAP, 335 ("; checking hi.lo %08x.%08x intr %x", 336 sc->sc_intmap[k].hi, sc->sc_intmap[k].lo, 337 sc->sc_intmap[k].intr)); 338 if (hi == sc->sc_intmap[k].hi && 339 lo == sc->sc_intmap[k].lo && 340 intr == sc->sc_intmap[k].intr) { 341 ea->ea_intr[j] = 342 sc->sc_intmap[k].cintr; 343 DPRINTF(EDB_INTRMAP, 344 ("; FOUND IT! changing to %d\n", 345 sc->sc_intmap[k].cintr)); 346 goto next_intr; 347 } 348 } 349 } 350 next_intr:; 351 } 352 } 353 354 /* 355 * bus space support. <sparc64/dev/psychoreg.h> has a discussion 356 * about PCI physical addresses, which also applies to ebus. 357 */ 358 bus_space_tag_t 359 ebus_alloc_bus_tag(struct ebus_softc *sc, int type) 360 { 361 bus_space_tag_t bt; 362 363 bt = (bus_space_tag_t) 364 malloc(sizeof(struct sparc_bus_space_tag), M_DEVBUF, M_NOWAIT); 365 if (bt == NULL) 366 panic("could not allocate ebus bus tag"); 367 368 memset(bt, 0, sizeof *bt); 369 bt->cookie = sc; 370 bt->parent = sc->sc_memtag; 371 bt->type = type; 372 bt->sparc_bus_map = _ebus_bus_map; 373 bt->sparc_bus_mmap = ebus_bus_mmap; 374 bt->sparc_intr_establish = ebus_intr_establish; 375 return (bt); 376 } 377 378 static int 379 _ebus_bus_map(bus_space_tag_t t, bus_addr_t ba, bus_size_t size, int flags, 380 vaddr_t va, bus_space_handle_t *hp) 381 { 382 struct ebus_softc *sc = t->cookie; 383 paddr_t offset; 384 u_int bar; 385 int i, ss; 386 387 bar = BUS_ADDR_IOSPACE(ba); 388 offset = BUS_ADDR_PADDR(ba); 389 390 DPRINTF(EDB_BUSMAP, 391 ("\n_ebus_bus_map: bar %d offset %08x sz %x flags %x va %p\n", 392 (int)bar, (uint32_t)offset, (uint32_t)size, 393 flags, (void *)va)); 394 395 for (i = 0; i < sc->sc_nrange; i++) { 396 bus_addr_t pciaddr; 397 398 if (bar != sc->sc_range[i].child_hi) 399 continue; 400 if (offset < sc->sc_range[i].child_lo || 401 (offset + size) > 402 (sc->sc_range[i].child_lo + sc->sc_range[i].size)) 403 continue; 404 405 /* Isolate address space and find the right tag */ 406 ss = (sc->sc_range[i].phys_hi>>24)&3; 407 switch (ss) { 408 case 1: /* I/O space */ 409 t = sc->sc_iotag; 410 break; 411 case 2: /* Memory space */ 412 t = sc->sc_memtag; 413 break; 414 case 0: /* Config space */ 415 case 3: /* 64-bit Memory space */ 416 default: /* WTF? */ 417 /* We don't handle these */ 418 panic("_ebus_bus_map: illegal space %x", ss); 419 break; 420 } 421 pciaddr = ((bus_addr_t)sc->sc_range[i].phys_mid << 32UL) | 422 sc->sc_range[i].phys_lo; 423 pciaddr += offset; 424 425 DPRINTF(EDB_BUSMAP, 426 ("_ebus_bus_map: mapping to PCI addr %x\n", 427 (uint32_t)pciaddr)); 428 429 /* pass it onto the psycho */ 430 return (bus_space_map(t, pciaddr, size, flags, hp)); 431 } 432 DPRINTF(EDB_BUSMAP, (": FAILED\n")); 433 return (EINVAL); 434 } 435 436 paddr_t 437 ebus_bus_mmap(bus_space_tag_t t, bus_addr_t paddr, off_t off, int prot, 438 int flags) 439 { 440 bus_addr_t offset = paddr; 441 struct ebus_softc *sc = t->cookie; 442 int i; 443 444 for (i = 0; i < sc->sc_nrange; i++) { 445 bus_addr_t paddr1 = 446 ((bus_addr_t)sc->sc_range[i].child_hi << 32) | 447 sc->sc_range[i].child_lo; 448 449 if (offset != paddr1) 450 continue; 451 452 DPRINTF(EDB_BUSMAP, ("\n_ebus_bus_mmap: mapping paddr %qx\n", 453 (unsigned long long)paddr1)); 454 return (bus_space_mmap(sc->sc_memtag, paddr1, off, 455 prot, flags)); 456 } 457 458 return (-1); 459 } 460 461 /* 462 * install an interrupt handler for a ebus device 463 */ 464 void * 465 ebus_intr_establish(bus_space_tag_t t, int pri, int level, 466 int (*handler)(void *), void *arg, void (*fastvec)(void) /* ignored */) 467 { 468 469 return (bus_intr_establish(t->parent, pri, level, handler, arg)); 470 } 471