ebus.c revision 1.67.4.1
1 /* $NetBSD: ebus.c,v 1.67.4.1 2021/08/04 02:57:07 thorpej 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 1.67.4.1 2021/08/04 02:57:07 thorpej 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/kmem.h> 64 #include <sys/systm.h> 65 #include <sys/time.h> 66 67 #define _SPARC_BUS_DMA_PRIVATE 68 #include <sys/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 <dev/ebus/ebusreg.h> 77 #include <dev/ebus/ebusvar.h> 78 #include <sparc64/dev/ebusvar.h> 79 80 int ebus_match(device_t, cfdata_t, void *); 81 void ebus_attach(device_t, device_t, void *); 82 83 CFATTACH_DECL_NEW(ebus, sizeof(struct ebus_softc), 84 ebus_match, ebus_attach, NULL, NULL); 85 86 /* 87 * here are our bus space and bus DMA routines. 88 */ 89 static int _ebus_bus_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, vaddr_t, 90 bus_space_handle_t *); 91 static void *ebus_intr_establish(bus_space_tag_t, int, int, int (*)(void *), 92 void *, void(*)(void)); 93 94 int 95 ebus_match(device_t parent, cfdata_t match, void *aux) 96 { 97 struct pci_attach_args *pa = aux; 98 char *name; 99 int node; 100 101 /* Only attach if there's a PROM node. */ 102 node = PCITAG_NODE(pa->pa_tag); 103 if (node == -1) 104 return (0); 105 106 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_BRIDGE) 107 return (0); 108 109 /* Match a real ebus */ 110 name = prom_getpropstring(node, "name"); 111 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN && 112 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUS && 113 strcmp(name, "ebus") == 0) 114 return (1); 115 116 /* Or a real ebus III */ 117 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN && 118 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUSIII && 119 strcmp(name, "ebus") == 0) 120 return (1); 121 122 /* Or a PCI-ISA bridge XXX I hope this is on-board. */ 123 if (PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) { 124 return (1); 125 } 126 127 /* Or the Altera bridge on SPARCle */ 128 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ALTERA && 129 PCI_PRODUCT(pa->pa_id) == 0 && 130 strcmp(name, "ebus") == 0) 131 return (1); 132 133 return (0); 134 } 135 136 /* 137 * attach an ebus and all its children. this code is modeled 138 * after the sbus code which does similar things. 139 */ 140 void 141 ebus_attach(device_t parent, device_t self, void *aux) 142 { 143 struct ebus_softc *sc = device_private(self); 144 struct pci_attach_args *pa = aux; 145 struct ebus_attach_args eba; 146 struct ebus_interrupt_map_mask *immp; 147 int node, nmapmask, error; 148 char devinfo[256]; 149 150 sc->sc_dev = self; 151 152 aprint_naive("\n"); 153 154 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 155 aprint_normal(": %s, revision 0x%02x\n", devinfo, 156 PCI_REVISION(pa->pa_class)); 157 158 sc->sc_memtag = pa->pa_memt; 159 sc->sc_iotag = pa->pa_iot; 160 sc->sc_childbustag = ebus_alloc_bus_tag(sc, PCI_MEMORY_BUS_SPACE); 161 sc->sc_dmatag = pa->pa_dmat; 162 163 node = PCITAG_NODE(pa->pa_tag); 164 if (node == -1) 165 panic("could not find ebus node"); 166 167 sc->sc_node = node; 168 169 /* 170 * fill in our softc with information from the prom 171 */ 172 sc->sc_intmap = NULL; 173 sc->sc_range = NULL; 174 sc->sc_nintmap = 0; 175 error = prom_getprop(node, "interrupt-map", 176 sizeof(struct ebus_interrupt_map), 177 &sc->sc_nintmap, &sc->sc_intmap); 178 switch (error) { 179 case 0: 180 immp = &sc->sc_intmapmask; 181 nmapmask = sizeof(*immp); 182 error = prom_getprop(node, "interrupt-map-mask", 183 sizeof(struct ebus_interrupt_map_mask), &nmapmask, 184 &immp); 185 if (error) 186 panic("could not get ebus interrupt-map-mask, error %d", 187 error); 188 if (nmapmask != 1) 189 panic("ebus interrupt-map-mask is broken"); 190 break; 191 case ENOENT: 192 break; 193 default: 194 panic("ebus interrupt-map: error %d", error); 195 break; 196 } 197 198 error = prom_getprop(node, "ranges", sizeof(struct ebus_ranges), 199 &sc->sc_nrange, &sc->sc_range); 200 if (error) 201 panic("ebus ranges: error %d", error); 202 203 /* 204 * now attach all our children 205 */ 206 DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node)); 207 for (node = firstchild(node); node; node = nextsibling(node)) { 208 char *name = prom_getpropstring(node, "name"); 209 210 if (ebus_setup_attach_args(sc, node, &eba) != 0) { 211 aprint_error("ebus_attach: %s: incomplete\n", name); 212 continue; 213 } else { 214 DPRINTF(EDB_CHILD, ("- found child `%s', attaching\n", 215 eba.ea_name)); 216 (void)config_found(self, &eba, ebus_print, 217 CFARGS(.devhandle = prom_node_to_devhandle(node))); 218 } 219 ebus_destroy_attach_args(&eba); 220 } 221 } 222 223 int ebus_setup_attach_args(struct ebus_softc *, int, 224 struct ebus_attach_args *); 225 int 226 ebus_setup_attach_args(struct ebus_softc *sc, int node, 227 struct ebus_attach_args *ea) 228 { 229 int n, rv; 230 231 memset(ea, 0, sizeof(struct ebus_attach_args)); 232 n = 0; 233 rv = prom_getprop(node, "name", 1, &n, &ea->ea_name); 234 if (rv != 0) 235 return (rv); 236 KASSERT(ea->ea_name[n-1] == '\0'); 237 238 ea->ea_node = node; 239 ea->ea_bustag = sc->sc_childbustag; 240 ea->ea_dmatag = sc->sc_dmatag; 241 242 rv = prom_getprop(node, "reg", sizeof(struct ebus_regs), &ea->ea_nreg, 243 &ea->ea_reg); 244 if (rv) 245 return (rv); 246 247 rv = prom_getprop(node, "address", sizeof(uint32_t), &ea->ea_nvaddr, 248 &ea->ea_vaddr); 249 if (rv != ENOENT) { 250 if (rv) 251 return (rv); 252 253 if (ea->ea_nreg != ea->ea_nvaddr) 254 printf("ebus loses: device %s: %d regs and %d addrs\n", 255 ea->ea_name, ea->ea_nreg, ea->ea_nvaddr); 256 } else 257 ea->ea_nvaddr = 0; 258 259 if (prom_getprop(node, "interrupts", sizeof(uint32_t), &ea->ea_nintr, 260 &ea->ea_intr)) 261 ea->ea_nintr = 0; 262 else 263 ebus_find_ino(sc, ea); 264 265 return (0); 266 } 267 268 void 269 ebus_destroy_attach_args(struct ebus_attach_args *ea) 270 { 271 272 if (ea->ea_name) 273 free((void *)ea->ea_name, M_DEVBUF); 274 if (ea->ea_reg) 275 free((void *)ea->ea_reg, M_DEVBUF); 276 if (ea->ea_intr) 277 free((void *)ea->ea_intr, M_DEVBUF); 278 if (ea->ea_vaddr) 279 free((void *)ea->ea_vaddr, M_DEVBUF); 280 } 281 282 int 283 ebus_print(void *aux, const char *p) 284 { 285 struct ebus_attach_args *ea = aux; 286 int i; 287 288 if (p) 289 aprint_normal("%s at %s", ea->ea_name, p); 290 for (i = 0; i < ea->ea_nreg; i++) 291 aprint_normal("%s %x-%x", i == 0 ? " addr" : ",", 292 ea->ea_reg[i].lo, 293 ea->ea_reg[i].lo + ea->ea_reg[i].size - 1); 294 for (i = 0; i < ea->ea_nintr; i++) 295 aprint_normal(" ipl %x", ea->ea_intr[i]); 296 return (UNCONF); 297 } 298 299 300 /* 301 * find the INO values for each interrupt and fill them in. 302 * 303 * for each "reg" property of this device, mask its hi and lo 304 * values with the "interrupt-map-mask"'s hi/lo values, and also 305 * mask the interrupt number with the interrupt mask. search the 306 * "interrupt-map" list for matching values of hi, lo and interrupt 307 * to give the INO for this interrupt. 308 */ 309 void 310 ebus_find_ino(struct ebus_softc *sc, struct ebus_attach_args *ea) 311 { 312 uint32_t hi, lo, intr; 313 int i, j, k; 314 315 if (sc->sc_nintmap == 0) { 316 for (i = 0; i < ea->ea_nintr; i++) { 317 OF_mapintr(ea->ea_node, &ea->ea_intr[i], 318 sizeof(ea->ea_intr[0]), 319 sizeof(ea->ea_intr[0])); 320 } 321 return; 322 } 323 324 DPRINTF(EDB_INTRMAP, 325 ("ebus_find_ino: searching %d interrupts", ea->ea_nintr)); 326 327 for (j = 0; j < ea->ea_nintr; j++) { 328 329 intr = ea->ea_intr[j] & sc->sc_intmapmask.intr; 330 331 DPRINTF(EDB_INTRMAP, 332 ("; intr %x masked to %x", ea->ea_intr[j], intr)); 333 for (i = 0; i < ea->ea_nreg; i++) { 334 hi = ea->ea_reg[i].hi & sc->sc_intmapmask.hi; 335 lo = ea->ea_reg[i].lo & sc->sc_intmapmask.lo; 336 337 DPRINTF(EDB_INTRMAP, 338 ("; reg hi.lo %08x.%08x masked to %08x.%08x", 339 ea->ea_reg[i].hi, ea->ea_reg[i].lo, hi, lo)); 340 for (k = 0; k < sc->sc_nintmap; k++) { 341 DPRINTF(EDB_INTRMAP, 342 ("; checking hi.lo %08x.%08x intr %x", 343 sc->sc_intmap[k].hi, sc->sc_intmap[k].lo, 344 sc->sc_intmap[k].intr)); 345 if (hi == sc->sc_intmap[k].hi && 346 lo == sc->sc_intmap[k].lo && 347 intr == sc->sc_intmap[k].intr) { 348 ea->ea_intr[j] = 349 sc->sc_intmap[k].cintr; 350 DPRINTF(EDB_INTRMAP, 351 ("; FOUND IT! changing to %d\n", 352 sc->sc_intmap[k].cintr)); 353 goto next_intr; 354 } 355 } 356 } 357 next_intr:; 358 } 359 } 360 361 /* 362 * bus space support. <sparc64/dev/psychoreg.h> has a discussion 363 * about PCI physical addresses, which also applies to ebus. 364 */ 365 bus_space_tag_t 366 ebus_alloc_bus_tag(struct ebus_softc *sc, int type) 367 { 368 bus_space_tag_t bt; 369 370 bt = kmem_zalloc(sizeof(*bt), KM_SLEEP); 371 bt->cookie = sc; 372 bt->parent = sc->sc_memtag; 373 bt->type = type; 374 bt->sparc_bus_map = _ebus_bus_map; 375 bt->sparc_bus_mmap = ebus_bus_mmap; 376 bt->sparc_intr_establish = ebus_intr_establish; 377 return (bt); 378 } 379 380 static int 381 _ebus_bus_map(bus_space_tag_t t, bus_addr_t ba, bus_size_t size, int flags, 382 vaddr_t va, bus_space_handle_t *hp) 383 { 384 struct ebus_softc *sc = t->cookie; 385 paddr_t offset; 386 u_int bar; 387 int i, ss; 388 389 bar = BUS_ADDR_IOSPACE(ba); 390 offset = BUS_ADDR_PADDR(ba); 391 392 DPRINTF(EDB_BUSMAP, 393 ("\n_ebus_bus_map: bar %d offset %08x sz %x flags %x va %p\n", 394 (int)bar, (uint32_t)offset, (uint32_t)size, 395 flags, (void *)va)); 396 397 for (i = 0; i < sc->sc_nrange; i++) { 398 bus_addr_t pciaddr; 399 400 if (bar != sc->sc_range[i].child_hi) 401 continue; 402 if (offset < sc->sc_range[i].child_lo || 403 (offset + size) > 404 (sc->sc_range[i].child_lo + sc->sc_range[i].size)) 405 continue; 406 407 /* Isolate address space and find the right tag */ 408 ss = (sc->sc_range[i].phys_hi>>24)&3; 409 switch (ss) { 410 case 1: /* I/O space */ 411 t = sc->sc_iotag; 412 break; 413 case 2: /* Memory space */ 414 t = sc->sc_memtag; 415 break; 416 case 0: /* Config space */ 417 case 3: /* 64-bit Memory space */ 418 default: /* WTF? */ 419 /* We don't handle these */ 420 panic("_ebus_bus_map: illegal space %x", ss); 421 break; 422 } 423 pciaddr = ((bus_addr_t)sc->sc_range[i].phys_mid << 32UL) | 424 sc->sc_range[i].phys_lo; 425 pciaddr += offset; 426 427 DPRINTF(EDB_BUSMAP, 428 ("_ebus_bus_map: mapping to PCI addr %x\n", 429 (uint32_t)pciaddr)); 430 431 /* pass it onto the psycho */ 432 return (bus_space_map(t, pciaddr, size, flags, hp)); 433 } 434 DPRINTF(EDB_BUSMAP, (": FAILED\n")); 435 return (EINVAL); 436 } 437 438 paddr_t 439 ebus_bus_mmap(bus_space_tag_t t, bus_addr_t paddr, off_t off, int prot, 440 int flags) 441 { 442 bus_addr_t offset = paddr; 443 struct ebus_softc *sc = t->cookie; 444 int i; 445 446 for (i = 0; i < sc->sc_nrange; i++) { 447 bus_addr_t paddr1 = 448 ((bus_addr_t)sc->sc_range[i].child_hi << 32) | 449 sc->sc_range[i].child_lo; 450 451 if (offset != paddr1) 452 continue; 453 454 DPRINTF(EDB_BUSMAP, ("\n_ebus_bus_mmap: mapping paddr %qx\n", 455 (unsigned long long)paddr1)); 456 return (bus_space_mmap(sc->sc_memtag, paddr1, off, 457 prot, flags)); 458 } 459 460 return (-1); 461 } 462 463 /* 464 * install an interrupt handler for a ebus device 465 */ 466 void * 467 ebus_intr_establish(bus_space_tag_t t, int pri, int level, 468 int (*handler)(void *), void *arg, void (*fastvec)(void) /* ignored */) 469 { 470 471 return (bus_intr_establish(t->parent, pri, level, handler, arg)); 472 } 473
Indexes created Fri Oct 03 02:09:57 GMT 2025