1 /* $NetBSD: ebus.c,v 1.64 2019/11/10 21:16:33 chs 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 1.64 2019/11/10 21:16:33 chs 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 /* Or the Altera bridge on SPARCle */ 127 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ALTERA && 128 PCI_PRODUCT(pa->pa_id) == 0 && 129 strcmp(name, "ebus") == 0) 130 return (1); 131 132 return (0); 133 } 134 135 /* 136 * attach an ebus and all its children. this code is modeled 137 * after the sbus code which does similar things. 138 */ 139 void 140 ebus_attach(device_t parent, device_t self, void *aux) 141 { 142 struct ebus_softc *sc = device_private(self); 143 struct pci_attach_args *pa = aux; 144 struct ebus_attach_args eba; 145 struct ebus_interrupt_map_mask *immp; 146 int node, nmapmask, error; 147 char devinfo[256]; 148 149 sc->sc_dev = self; 150 151 aprint_naive("\n"); 152 153 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 154 aprint_normal(": %s, revision 0x%02x\n", devinfo, 155 PCI_REVISION(pa->pa_class)); 156 157 sc->sc_memtag = pa->pa_memt; 158 sc->sc_iotag = pa->pa_iot; 159 sc->sc_childbustag = ebus_alloc_bus_tag(sc, PCI_MEMORY_BUS_SPACE); 160 sc->sc_dmatag = pa->pa_dmat; 161 162 node = PCITAG_NODE(pa->pa_tag); 163 if (node == -1) 164 panic("could not find ebus node"); 165 166 sc->sc_node = node; 167 168 /* 169 * fill in our softc with information from the prom 170 */ 171 sc->sc_intmap = NULL; 172 sc->sc_range = NULL; 173 sc->sc_nintmap = 0; 174 error = prom_getprop(node, "interrupt-map", 175 sizeof(struct ebus_interrupt_map), 176 &sc->sc_nintmap, &sc->sc_intmap); 177 switch (error) { 178 case 0: 179 immp = &sc->sc_intmapmask; 180 nmapmask = sizeof(*immp); 181 error = prom_getprop(node, "interrupt-map-mask", 182 sizeof(struct ebus_interrupt_map_mask), &nmapmask, 183 &immp); 184 if (error) 185 panic("could not get ebus interrupt-map-mask, error %d", 186 error); 187 if (nmapmask != 1) 188 panic("ebus interrupt-map-mask is broken"); 189 break; 190 case ENOENT: 191 break; 192 default: 193 panic("ebus interrupt-map: error %d", error); 194 break; 195 } 196 197 error = prom_getprop(node, "ranges", sizeof(struct ebus_ranges), 198 &sc->sc_nrange, &sc->sc_range); 199 if (error) 200 panic("ebus ranges: error %d", error); 201 202 /* 203 * now attach all our children 204 */ 205 DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node)); 206 for (node = firstchild(node); node; node = nextsibling(node)) { 207 char *name = prom_getpropstring(node, "name"); 208 209 if (ebus_setup_attach_args(sc, node, &eba) != 0) { 210 aprint_error("ebus_attach: %s: incomplete\n", name); 211 continue; 212 } else { 213 DPRINTF(EDB_CHILD, ("- found child `%s', attaching\n", 214 eba.ea_name)); 215 (void)config_found(self, &eba, ebus_print); 216 } 217 ebus_destroy_attach_args(&eba); 218 } 219 } 220 221 int ebus_setup_attach_args(struct ebus_softc *, int, 222 struct ebus_attach_args *); 223 int 224 ebus_setup_attach_args(struct ebus_softc *sc, int node, 225 struct ebus_attach_args *ea) 226 { 227 int n, rv; 228 229 memset(ea, 0, sizeof(struct ebus_attach_args)); 230 n = 0; 231 rv = prom_getprop(node, "name", 1, &n, &ea->ea_name); 232 if (rv != 0) 233 return (rv); 234 KASSERT(ea->ea_name[n-1] == '\0'); 235 236 ea->ea_node = node; 237 ea->ea_bustag = sc->sc_childbustag; 238 ea->ea_dmatag = sc->sc_dmatag; 239 240 rv = prom_getprop(node, "reg", sizeof(struct ebus_regs), &ea->ea_nreg, 241 &ea->ea_reg); 242 if (rv) 243 return (rv); 244 245 rv = prom_getprop(node, "address", sizeof(uint32_t), &ea->ea_nvaddr, 246 &ea->ea_vaddr); 247 if (rv != ENOENT) { 248 if (rv) 249 return (rv); 250 251 if (ea->ea_nreg != ea->ea_nvaddr) 252 printf("ebus loses: device %s: %d regs and %d addrs\n", 253 ea->ea_name, ea->ea_nreg, ea->ea_nvaddr); 254 } else 255 ea->ea_nvaddr = 0; 256 257 if (prom_getprop(node, "interrupts", sizeof(uint32_t), &ea->ea_nintr, 258 &ea->ea_intr)) 259 ea->ea_nintr = 0; 260 else 261 ebus_find_ino(sc, ea); 262 263 return (0); 264 } 265 266 void 267 ebus_destroy_attach_args(struct ebus_attach_args *ea) 268 { 269 270 if (ea->ea_name) 271 free((void *)ea->ea_name, M_DEVBUF); 272 if (ea->ea_reg) 273 free((void *)ea->ea_reg, M_DEVBUF); 274 if (ea->ea_intr) 275 free((void *)ea->ea_intr, M_DEVBUF); 276 if (ea->ea_vaddr) 277 free((void *)ea->ea_vaddr, M_DEVBUF); 278 } 279 280 int 281 ebus_print(void *aux, const char *p) 282 { 283 struct ebus_attach_args *ea = aux; 284 int i; 285 286 if (p) 287 aprint_normal("%s at %s", ea->ea_name, p); 288 for (i = 0; i < ea->ea_nreg; i++) 289 aprint_normal("%s %x-%x", i == 0 ? " addr" : ",", 290 ea->ea_reg[i].lo, 291 ea->ea_reg[i].lo + ea->ea_reg[i].size - 1); 292 for (i = 0; i < ea->ea_nintr; i++) 293 aprint_normal(" ipl %x", ea->ea_intr[i]); 294 return (UNCONF); 295 } 296 297 298 /* 299 * find the INO values for each interrupt and fill them in. 300 * 301 * for each "reg" property of this device, mask its hi and lo 302 * values with the "interrupt-map-mask"'s hi/lo values, and also 303 * mask the interrupt number with the interrupt mask. search the 304 * "interrupt-map" list for matching values of hi, lo and interrupt 305 * to give the INO for this interrupt. 306 */ 307 void 308 ebus_find_ino(struct ebus_softc *sc, struct ebus_attach_args *ea) 309 { 310 uint32_t hi, lo, intr; 311 int i, j, k; 312 313 if (sc->sc_nintmap == 0) { 314 for (i = 0; i < ea->ea_nintr; i++) { 315 OF_mapintr(ea->ea_node, &ea->ea_intr[i], 316 sizeof(ea->ea_intr[0]), 317 sizeof(ea->ea_intr[0])); 318 } 319 return; 320 } 321 322 DPRINTF(EDB_INTRMAP, 323 ("ebus_find_ino: searching %d interrupts", ea->ea_nintr)); 324 325 for (j = 0; j < ea->ea_nintr; j++) { 326 327 intr = ea->ea_intr[j] & sc->sc_intmapmask.intr; 328 329 DPRINTF(EDB_INTRMAP, 330 ("; intr %x masked to %x", ea->ea_intr[j], intr)); 331 for (i = 0; i < ea->ea_nreg; i++) { 332 hi = ea->ea_reg[i].hi & sc->sc_intmapmask.hi; 333 lo = ea->ea_reg[i].lo & sc->sc_intmapmask.lo; 334 335 DPRINTF(EDB_INTRMAP, 336 ("; reg hi.lo %08x.%08x masked to %08x.%08x", 337 ea->ea_reg[i].hi, ea->ea_reg[i].lo, hi, lo)); 338 for (k = 0; k < sc->sc_nintmap; k++) { 339 DPRINTF(EDB_INTRMAP, 340 ("; checking hi.lo %08x.%08x intr %x", 341 sc->sc_intmap[k].hi, sc->sc_intmap[k].lo, 342 sc->sc_intmap[k].intr)); 343 if (hi == sc->sc_intmap[k].hi && 344 lo == sc->sc_intmap[k].lo && 345 intr == sc->sc_intmap[k].intr) { 346 ea->ea_intr[j] = 347 sc->sc_intmap[k].cintr; 348 DPRINTF(EDB_INTRMAP, 349 ("; FOUND IT! changing to %d\n", 350 sc->sc_intmap[k].cintr)); 351 goto next_intr; 352 } 353 } 354 } 355 next_intr:; 356 } 357 } 358 359 /* 360 * bus space support. <sparc64/dev/psychoreg.h> has a discussion 361 * about PCI physical addresses, which also applies to ebus. 362 */ 363 bus_space_tag_t 364 ebus_alloc_bus_tag(struct ebus_softc *sc, int type) 365 { 366 bus_space_tag_t bt; 367 368 bt = malloc(sizeof(struct sparc_bus_space_tag), M_DEVBUF, M_WAITOK | M_ZERO); 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