acpi_mcfg.c revision 1.24
1 /* $NetBSD: acpi_mcfg.c,v 1.24 2021/08/07 21:19:15 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (C) 2015 NONAKA Kimihiro <nonaka (at) NetBSD.org> 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, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "opt_pci.h" 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: acpi_mcfg.c,v 1.24 2021/08/07 21:19:15 jmcneill Exp $"); 32 33 #include <sys/param.h> 34 #include <sys/device.h> 35 #include <sys/kmem.h> 36 #include <sys/systm.h> 37 38 #include <dev/pci/pcireg.h> 39 #include <dev/pci/pcivar.h> 40 #include <dev/pci/pciconf.h> 41 #include <dev/pci/pcidevs.h> 42 43 #include <dev/acpi/acpireg.h> 44 #include <dev/acpi/acpivar.h> 45 #include <dev/acpi/acpi_mcfg.h> 46 47 #include "locators.h" 48 49 #define _COMPONENT ACPI_RESOURCE_COMPONENT 50 ACPI_MODULE_NAME ("acpi_mcfg") 51 52 #define EXTCONF_OFFSET(d, f, r) ((((d) * 8 + (f)) * PCI_EXTCONF_SIZE) + (r)) 53 54 #define PCIDEV_SET_VALID(mb, d, f) ((mb)->valid_devs[(d)] |= __BIT((f))) 55 #define PCIDEV_SET_INVALID(mb, d, f) ((mb)->valid_devs[(d)] &= ~__BIT((f))) 56 #define PCIDEV_IS_VALID(mb, d, f) ((mb)->valid_devs[(d)] & __BIT((f))) 57 58 #define EXTCONF_SET_VALID(mb, d, f) ((mb)->valid_extconf[(d)] |= __BIT((f))) 59 #define EXTCONF_SET_INVALID(mb, d, f) ((mb)->valid_extconf[(d)] &= ~__BIT((f))) 60 #define EXTCONF_IS_VALID(mb, d, f) ((mb)->valid_extconf[(d)] & __BIT((f))) 61 62 struct mcfg_segment { 63 uint64_t ms_address; /* Base address */ 64 int ms_segment; /* Segment # */ 65 int ms_bus_start; /* Start bus # */ 66 int ms_bus_end; /* End bus # */ 67 bus_space_tag_t ms_bst; 68 struct mcfg_bus { 69 bus_space_handle_t bsh[32][8]; 70 uint8_t valid_devs[32]; 71 uint8_t valid_extconf[32]; 72 int valid_ndevs; 73 pcitag_t last_probed; 74 } *ms_bus; 75 }; 76 77 static struct mcfg_segment *mcfg_segs; 78 static int mcfg_nsegs; 79 static ACPI_TABLE_MCFG *mcfg; 80 static int mcfg_inited; 81 static struct acpi_softc *acpi_sc; 82 83 static const struct acpimcfg_ops mcfg_default_ops = { 84 .ao_validate = acpimcfg_default_validate, 85 86 .ao_read = acpimcfg_default_read, 87 .ao_write = acpimcfg_default_write, 88 }; 89 static const struct acpimcfg_ops *mcfg_ops = &mcfg_default_ops; 90 91 /* 92 * default operations. 93 */ 94 bool 95 acpimcfg_default_validate(uint64_t address, int bus_start, int *bus_end) 96 { 97 98 /* Always Ok */ 99 return true; 100 } 101 102 uint32_t 103 acpimcfg_default_read(bus_space_tag_t bst, bus_space_handle_t bsh, 104 bus_addr_t addr) 105 { 106 107 return bus_space_read_4(bst, bsh, addr); 108 } 109 110 void 111 acpimcfg_default_write(bus_space_tag_t bst, bus_space_handle_t bsh, 112 bus_addr_t addr, uint32_t data) 113 { 114 115 bus_space_write_4(bst, bsh, addr, data); 116 } 117 118 119 /* 120 * Check MCFG memory region at system resource 121 */ 122 struct acpimcfg_memrange { 123 const char *hid; 124 uint64_t address; 125 int bus_start; 126 int bus_end; 127 bool found; 128 }; 129 130 static ACPI_STATUS 131 acpimcfg_parse_callback(ACPI_RESOURCE *res, void *ctx) 132 { 133 struct acpimcfg_memrange *mr = ctx; 134 const char *type; 135 uint64_t size, mapaddr, mapsize; 136 int n; 137 138 switch (res->Type) { 139 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: 140 type = "FIXED_MEMORY32"; 141 mapaddr = res->Data.FixedMemory32.Address; 142 mapsize = res->Data.FixedMemory32.AddressLength; 143 break; 144 145 case ACPI_RESOURCE_TYPE_ADDRESS32: 146 /* XXX Only fixed size supported for now */ 147 if (res->Data.Address32.Address.AddressLength == 0 || 148 res->Data.Address32.ProducerConsumer != ACPI_CONSUMER) 149 goto out; 150 151 if (res->Data.Address32.ResourceType != ACPI_MEMORY_RANGE) 152 goto out; 153 154 if (res->Data.Address32.MinAddressFixed != ACPI_ADDRESS_FIXED || 155 res->Data.Address32.MaxAddressFixed != ACPI_ADDRESS_FIXED) 156 goto out; 157 158 type = "ADDRESS32"; 159 mapaddr = res->Data.Address32.Address.Minimum; 160 mapsize = res->Data.Address32.Address.AddressLength; 161 break; 162 163 #ifdef _LP64 164 case ACPI_RESOURCE_TYPE_ADDRESS64: 165 /* XXX Only fixed size supported for now */ 166 if (res->Data.Address64.Address.AddressLength == 0 || 167 res->Data.Address64.ProducerConsumer != ACPI_CONSUMER) 168 goto out; 169 170 if (res->Data.Address64.ResourceType != ACPI_MEMORY_RANGE) 171 goto out; 172 173 if (res->Data.Address64.MinAddressFixed != ACPI_ADDRESS_FIXED || 174 res->Data.Address64.MaxAddressFixed != ACPI_ADDRESS_FIXED) 175 goto out; 176 177 type = "ADDRESS64"; 178 mapaddr = res->Data.Address64.Address.Minimum; 179 mapsize = res->Data.Address64.Address.AddressLength; 180 break; 181 #endif 182 183 default: 184 out: 185 aprint_debug_dev(acpi_sc->sc_dev, "MCFG: %s: Type=%d\n", 186 mr->hid, res->Type); 187 return_ACPI_STATUS(AE_OK); 188 } 189 190 aprint_debug_dev(acpi_sc->sc_dev, "MCFG: %s: Type=%d(%s), " 191 "Address=0x%016" PRIx64 ", Length=0x%016" PRIx64 "\n", 192 mr->hid, res->Type, type, mapaddr, mapsize); 193 194 if (mr->address < mapaddr || mr->address >= mapaddr + mapsize) 195 return_ACPI_STATUS(AE_OK); 196 197 size = (mr->bus_end - mr->bus_start + 1) * ACPIMCFG_SIZE_PER_BUS; 198 199 /* full map */ 200 if (mr->address + size <= mapaddr + mapsize) { 201 mr->found = true; 202 return_ACPI_STATUS(AE_CTRL_TERMINATE); 203 } 204 205 /* partial map */ 206 n = (mapsize - (mr->address - mapaddr)) / ACPIMCFG_SIZE_PER_BUS; 207 /* bus_start == bus_end is not allowed. */ 208 if (n > 1) { 209 mr->bus_end = mr->bus_start + n - 1; 210 mr->found = true; 211 return_ACPI_STATUS(AE_CTRL_TERMINATE); 212 } 213 214 aprint_debug_dev(acpi_sc->sc_dev, "MCFG: bus %d-%d, " 215 "address 0x%016" PRIx64 ": invalid size: request 0x%016" PRIx64 216 ", actual 0x%016" PRIx64 "\n", 217 mr->bus_start, mr->bus_end, mr->address, size, mapsize); 218 219 return_ACPI_STATUS(AE_OK); 220 } 221 222 static ACPI_STATUS 223 acpimcfg_check_system_resource(ACPI_HANDLE handle, UINT32 level, void *ctx, 224 void **retval) 225 { 226 struct acpimcfg_memrange *mr = ctx; 227 ACPI_STATUS status; 228 229 status = AcpiWalkResources(handle, "_CRS", acpimcfg_parse_callback, mr); 230 if (ACPI_FAILURE(status)) 231 return_ACPI_STATUS(status); 232 233 if (mr->found) 234 return_ACPI_STATUS(AE_CTRL_TERMINATE); 235 236 aprint_debug_dev(acpi_sc->sc_dev, "MCFG: %s: bus %d-%d, " 237 "address 0x%016" PRIx64 ": no valid region\n", mr->hid, 238 mr->bus_start, mr->bus_end, mr->address); 239 240 return_ACPI_STATUS(AE_OK); 241 } 242 243 static bool 244 acpimcfg_find_system_resource(uint64_t address, int bus_start, int *bus_end) 245 { 246 static const char *system_resource_hid[] = { 247 "PNP0C01", /* System Board */ 248 "PNP0C02" /* General ID for reserving resources */ 249 }; 250 struct acpimcfg_memrange mr; 251 ACPI_STATUS status; 252 int i; 253 254 mr.address = address; 255 mr.bus_start = bus_start; 256 mr.bus_end = *bus_end; 257 mr.found = false; 258 259 for (i = 0; i < __arraycount(system_resource_hid); i++) { 260 mr.hid = system_resource_hid[i]; 261 status = AcpiGetDevices(__UNCONST(system_resource_hid[i]), 262 acpimcfg_check_system_resource, &mr, NULL); 263 if (ACPI_FAILURE(status)) 264 continue; 265 if (mr.found) { 266 *bus_end = mr.bus_end; 267 return true; 268 } 269 } 270 return false; 271 } 272 273 274 /* 275 * ACPI MCFG 276 */ 277 void 278 acpimcfg_probe(struct acpi_softc *sc) 279 { 280 ACPI_MCFG_ALLOCATION *ama; 281 ACPI_STATUS status; 282 uint32_t offset; 283 int i, nsegs; 284 285 if (acpi_sc != NULL) 286 panic("acpi_sc != NULL"); 287 acpi_sc = sc; 288 289 status = AcpiGetTable(ACPI_SIG_MCFG, 0, (ACPI_TABLE_HEADER **)&mcfg); 290 if (ACPI_FAILURE(status)) { 291 mcfg = NULL; 292 return; 293 } 294 295 nsegs = 0; 296 offset = sizeof(ACPI_TABLE_MCFG); 297 ama = ACPI_ADD_PTR(ACPI_MCFG_ALLOCATION, mcfg, offset); 298 for (i = 0; offset + sizeof(ACPI_MCFG_ALLOCATION) <= 299 mcfg->Header.Length; i++) { 300 aprint_debug_dev(sc->sc_dev, 301 "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 "\n", 302 ama->PciSegment, ama->StartBusNumber, ama->EndBusNumber, 303 ama->Address); 304 nsegs++; 305 offset += sizeof(ACPI_MCFG_ALLOCATION); 306 ama = ACPI_ADD_PTR(ACPI_MCFG_ALLOCATION, mcfg, offset); 307 } 308 if (nsegs == 0) { 309 mcfg = NULL; 310 return; 311 } 312 313 mcfg_segs = kmem_zalloc(sizeof(*mcfg_segs) * nsegs, KM_SLEEP); 314 mcfg_nsegs = nsegs; 315 } 316 317 int 318 acpimcfg_init(bus_space_tag_t memt, const struct acpimcfg_ops *ops) 319 { 320 ACPI_MCFG_ALLOCATION *ama; 321 struct mcfg_segment *seg; 322 uint32_t offset; 323 int i, n, nsegs, bus_end; 324 325 if (mcfg == NULL) 326 return ENXIO; 327 328 if (mcfg_inited) 329 return 0; 330 331 if (ops != NULL) 332 mcfg_ops = ops; 333 334 nsegs = 0; 335 offset = sizeof(ACPI_TABLE_MCFG); 336 ama = ACPI_ADD_PTR(ACPI_MCFG_ALLOCATION, mcfg, offset); 337 for (i = 0; offset < mcfg->Header.Length; i++) { 338 #ifndef _LP64 339 if (ama->Address >= 0x100000000ULL) { 340 aprint_debug_dev(acpi_sc->sc_dev, 341 "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 342 ": ignore (64bit address)\n", ama->PciSegment, 343 ama->StartBusNumber, ama->EndBusNumber, 344 ama->Address); 345 goto next; 346 } 347 #endif 348 /* 349 * Some (broken?) BIOSen have an MCFG table for an empty 350 * bus range. Ignore those tables. 351 */ 352 if (ama->StartBusNumber > ama->EndBusNumber) { 353 aprint_debug_dev(acpi_sc->sc_dev, 354 "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 355 ": ignore (bus %d > %d)\n", ama->PciSegment, 356 ama->StartBusNumber, ama->EndBusNumber, 357 ama->Address, ama->StartBusNumber, 358 ama->EndBusNumber); 359 goto next; 360 } 361 362 /* Validate MCFG memory range */ 363 bus_end = ama->EndBusNumber; 364 if (mcfg_ops->ao_validate != NULL && 365 !mcfg_ops->ao_validate(ama->Address, ama->StartBusNumber, 366 &bus_end)) { 367 if (!acpimcfg_find_system_resource(ama->Address, 368 ama->StartBusNumber, &bus_end)) { 369 aprint_debug_dev(acpi_sc->sc_dev, 370 "MCFG: segment %d, bus %d-%d, " 371 "address 0x%016" PRIx64 372 ": ignore (invalid address)\n", 373 ama->PciSegment, 374 ama->StartBusNumber, ama->EndBusNumber, 375 ama->Address); 376 goto next; 377 } 378 } 379 if (ama->EndBusNumber != bus_end) { 380 aprint_debug_dev(acpi_sc->sc_dev, 381 "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 382 " -> bus %d-%d\n", ama->PciSegment, 383 ama->StartBusNumber, ama->EndBusNumber, 384 ama->Address, ama->StartBusNumber, bus_end); 385 } 386 387 #ifndef __HAVE_PCI_GET_SEGMENT 388 if (ama->PciSegment != 0) { 389 aprint_debug_dev(acpi_sc->sc_dev, 390 "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 391 ": ignore (non PCI segment 0)\n", ama->PciSegment, 392 ama->StartBusNumber, bus_end, ama->Address); 393 goto next; 394 } 395 #endif 396 397 seg = &mcfg_segs[nsegs++]; 398 seg->ms_address = ama->Address; 399 seg->ms_segment = ama->PciSegment; 400 seg->ms_bus_start = ama->StartBusNumber; 401 seg->ms_bus_end = bus_end; 402 seg->ms_bst = memt; 403 n = seg->ms_bus_end - seg->ms_bus_start + 1; 404 seg->ms_bus = kmem_zalloc(sizeof(*seg->ms_bus) * n, KM_SLEEP); 405 406 next: 407 offset += sizeof(ACPI_MCFG_ALLOCATION); 408 ama = ACPI_ADD_PTR(ACPI_MCFG_ALLOCATION, mcfg, offset); 409 } 410 if (nsegs == 0) 411 return ENOENT; 412 413 for (i = 0; i < nsegs; i++) { 414 seg = &mcfg_segs[i]; 415 aprint_verbose_dev(acpi_sc->sc_dev, 416 "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 "\n", 417 seg->ms_segment, seg->ms_bus_start, seg->ms_bus_end, 418 seg->ms_address); 419 } 420 421 /* Update # of segment */ 422 mcfg_nsegs = nsegs; 423 mcfg_inited = true; 424 425 return 0; 426 } 427 428 static int 429 acpimcfg_ext_conf_is_aliased(pci_chipset_tag_t pc, pcitag_t tag) 430 { 431 pcireg_t id; 432 int i; 433 434 id = pci_conf_read(pc, tag, PCI_ID_REG); 435 for (i = PCI_CONF_SIZE; i < PCI_EXTCONF_SIZE; i += PCI_CONF_SIZE) { 436 if (pci_conf_read(pc, tag, i) != id) 437 return false; 438 } 439 return true; 440 } 441 442 static struct mcfg_segment * 443 acpimcfg_get_segment(pci_chipset_tag_t pc, int bus) 444 { 445 struct mcfg_segment *seg; 446 u_int segment; 447 int i; 448 449 #ifdef __HAVE_PCI_GET_SEGMENT 450 segment = pci_get_segment(pc); 451 #else 452 segment = 0; 453 #endif 454 455 for (i = 0; i < mcfg_nsegs; i++) { 456 seg = &mcfg_segs[i]; 457 if (segment == seg->ms_segment && 458 bus >= seg->ms_bus_start && bus <= seg->ms_bus_end) 459 return seg; 460 } 461 return NULL; 462 } 463 464 static int 465 acpimcfg_device_probe(const struct pci_attach_args *pa) 466 { 467 pci_chipset_tag_t pc = pa->pa_pc; 468 struct mcfg_segment *seg; 469 struct mcfg_bus *mb; 470 pcitag_t tag; 471 pcireg_t reg; 472 int bus = pa->pa_bus; 473 int dev = pa->pa_device; 474 int func = pa->pa_function; 475 int last_dev, last_func, end_func; 476 int alias = 0; 477 const struct pci_quirkdata *qd; 478 bool force_hasextcnf = false; 479 bool force_noextcnf = false; 480 int i, j; 481 482 seg = acpimcfg_get_segment(pc, bus); 483 if (seg == NULL) 484 return 0; 485 486 mb = &seg->ms_bus[bus - seg->ms_bus_start]; 487 tag = pci_make_tag(pc, bus, dev, func); 488 489 /* Mark invalid between last probed device to probed device. */ 490 pci_decompose_tag(pc, mb->last_probed, NULL, &last_dev, &last_func); 491 if (dev != 0 || func != 0) { 492 for (i = last_dev; i <= dev; i++) { 493 end_func = (i == dev) ? func : 8; 494 for (j = last_func; j < end_func; j++) { 495 if (i == last_dev && j == last_func) 496 continue; 497 PCIDEV_SET_INVALID(mb, i, j); 498 } 499 last_func = 0; 500 } 501 } 502 mb->last_probed = tag; 503 504 reg = pci_conf_read(pc, tag, PCI_ID_REG); 505 qd = pci_lookup_quirkdata(PCI_VENDOR(reg), PCI_PRODUCT(reg)); 506 if (qd != NULL && (qd->quirks & PCI_QUIRK_HASEXTCNF) != 0) 507 force_hasextcnf = true; 508 if (qd != NULL && (qd->quirks & PCI_QUIRK_NOEXTCNF) != 0) 509 force_noextcnf = true; 510 511 /* Probe extended configuration space. */ 512 if ((!force_hasextcnf) && ((force_noextcnf) || 513 ((reg = pci_conf_read(pc, tag, PCI_CONF_SIZE)) == (pcireg_t)-1) 514 || (reg == 0) 515 || (alias = acpimcfg_ext_conf_is_aliased(pc, tag)))) { 516 aprint_debug_dev(acpi_sc->sc_dev, 517 "MCFG: %03d:%02d:%d: invalid config space " 518 "(cfg[0x%03x]=0x%08x, alias=%s)\n", bus, dev, func, 519 PCI_CONF_SIZE, reg, alias ? "true" : "false"); 520 EXTCONF_SET_INVALID(mb, dev, func); 521 } 522 523 aprint_debug_dev(acpi_sc->sc_dev, 524 "MCFG: %03d:%02d:%d: Ok (cfg[0x%03x]=0x%08x extconf=%c)\n", 525 bus, dev, func, PCI_CONF_SIZE, reg, 526 EXTCONF_IS_VALID(mb, dev, func) ? 'Y' : 'N'); 527 mb->valid_ndevs++; 528 529 return 0; 530 } 531 532 #ifdef PCI_MACHDEP_ENUMERATE_BUS 533 #define pci_enumerate_bus PCI_MACHDEP_ENUMERATE_BUS 534 #endif 535 536 static void 537 acpimcfg_scan_bus(struct pci_softc *sc, pci_chipset_tag_t pc, int bus) 538 { 539 static const int wildcard[PCICF_NLOCS] = { 540 PCICF_DEV_DEFAULT, PCICF_FUNCTION_DEFAULT 541 }; 542 543 sc->sc_bus = bus; /* XXX */ 544 sc->sc_pc = pc; 545 546 pci_enumerate_bus(sc, wildcard, acpimcfg_device_probe, NULL); 547 } 548 549 int 550 acpimcfg_map_bus(device_t self, pci_chipset_tag_t pc, int bus) 551 { 552 struct pci_softc *sc = device_private(self); 553 struct mcfg_segment *seg = NULL; 554 struct mcfg_bus *mb; 555 bus_space_handle_t bsh; 556 bus_addr_t baddr; 557 pcitag_t tag; 558 pcireg_t reg; 559 bool is_e7520_mch; 560 int boff; 561 int last_dev, last_func; 562 int i, j; 563 int error; 564 565 if (!mcfg_inited) 566 return ENXIO; 567 568 seg = acpimcfg_get_segment(pc, bus); 569 if (seg == NULL) 570 return ENOENT; 571 572 boff = bus - seg->ms_bus_start; 573 if (seg->ms_bus[boff].valid_ndevs > 0) 574 return 0; 575 576 mb = &seg->ms_bus[boff]; 577 baddr = seg->ms_address + (bus * ACPIMCFG_SIZE_PER_BUS); 578 579 /* Map extended configuration space of all dev/func. */ 580 error = bus_space_map(seg->ms_bst, baddr, ACPIMCFG_SIZE_PER_BUS, 0, 581 &bsh); 582 if (error != 0) 583 return error; 584 for (i = 0; i < 32; i++) { 585 for (j = 0; j < 8; j++) { 586 error = bus_space_subregion(seg->ms_bst, bsh, 587 EXTCONF_OFFSET(i, j, 0), PCI_EXTCONF_SIZE, 588 &mb->bsh[i][j]); 589 if (error != 0) 590 break; 591 } 592 } 593 if (error != 0) 594 return error; 595 596 aprint_debug("\n"); 597 598 /* Probe extended configuration space of all devices. */ 599 memset(mb->valid_devs, 0xff, sizeof(mb->valid_devs)); 600 memset(mb->valid_extconf, 0xff, sizeof(mb->valid_extconf)); 601 mb->valid_ndevs = 0; 602 mb->last_probed = pci_make_tag(pc, bus, 0, 0); 603 604 /* 605 * On an Intel E7520 we have to temporarily disable 606 * Enhanced Config Access error detection and reporting 607 * by setting the appropriate error mask in HI_ERRMASK register. 608 * 609 * See "Intel E7520 Memory Controller Hub (MCH) Datasheet", 610 * Document 303006-002, pg. 82 611 */ 612 tag = pci_make_tag(pc, 0, 0, 1); 613 reg = pci_conf_read(pc, tag, PCI_ID_REG); 614 is_e7520_mch = (reg == 615 PCI_ID_CODE(PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_E7525_MCHER)); 616 if (is_e7520_mch) { 617 reg = pci_conf_read(pc, tag, 0x54); 618 pci_conf_write(pc, tag, 0x54, reg | 0x20); 619 } 620 621 acpimcfg_scan_bus(sc, pc, bus); 622 623 if (is_e7520_mch) { 624 pci_conf_write(pc, tag, 0x54, reg); 625 } 626 627 /* Unmap configuration space of all dev/func. */ 628 bus_space_unmap(seg->ms_bst, bsh, ACPIMCFG_SIZE_PER_BUS); 629 memset(mb->bsh, 0, sizeof(mb->bsh)); 630 631 if (mb->valid_ndevs == 0) { 632 aprint_debug_dev(acpi_sc->sc_dev, 633 "MCFG: bus %d: no valid devices.\n", bus); 634 memset(mb->valid_devs, 0, sizeof(mb->valid_devs)); 635 goto out; 636 } 637 638 /* Mark invalid on remaining all devices. */ 639 pci_decompose_tag(pc, mb->last_probed, NULL, &last_dev, &last_func); 640 for (i = last_dev; i < 32; i++) { 641 for (j = last_func; j < 8; j++) { 642 if (i == last_dev && j == last_func) { 643 /* Don't mark invalid to last probed device. */ 644 continue; 645 } 646 PCIDEV_SET_INVALID(mb, i, j); 647 } 648 last_func = 0; 649 } 650 651 /* Map configuration space per dev/func. */ 652 for (i = 0; i < 32; i++) { 653 for (j = 0; j < 8; j++) { 654 if (!PCIDEV_IS_VALID(mb, i, j)) 655 continue; 656 error = bus_space_map(seg->ms_bst, 657 baddr + EXTCONF_OFFSET(i, j, 0), PCI_EXTCONF_SIZE, 658 0, &mb->bsh[i][j]); 659 if (error != 0) { 660 /* Unmap all handles when map failed. */ 661 do { 662 while (--j >= 0) { 663 if (!PCIDEV_IS_VALID(mb, i, j)) 664 continue; 665 bus_space_unmap(seg->ms_bst, 666 mb->bsh[i][j], 667 PCI_EXTCONF_SIZE); 668 } 669 j = 8; 670 } while (--i >= 0); 671 memset(mb->valid_devs, 0, 672 sizeof(mb->valid_devs)); 673 goto out; 674 } 675 } 676 } 677 678 aprint_debug_dev(acpi_sc->sc_dev, "MCFG: bus %d: valid devices\n", bus); 679 for (i = 0; i < 32; i++) { 680 for (j = 0; j < 8; j++) { 681 if (PCIDEV_IS_VALID(mb, i, j)) { 682 aprint_debug_dev(acpi_sc->sc_dev, 683 "MCFG: %03d:%02d:%d\n", bus, i, j); 684 } 685 } 686 } 687 688 error = 0; 689 out: 690 aprint_debug_dev(acpi_sc->sc_dev, "%s done", __func__); 691 692 return error; 693 } 694 695 #ifdef PCI_NETBSD_CONFIGURE 696 ACPI_STATUS 697 acpimcfg_configure_bus_cb(ACPI_RESOURCE *res, void *ctx) 698 { 699 struct pciconf_resources *pcires = ctx; 700 int type; 701 bus_addr_t addr; 702 bus_size_t size; 703 const char *s; 704 int error; 705 706 if (res->Type != ACPI_RESOURCE_TYPE_ADDRESS16 && 707 res->Type != ACPI_RESOURCE_TYPE_ADDRESS32 && 708 res->Type != ACPI_RESOURCE_TYPE_ADDRESS64) 709 return AE_OK; 710 711 if (res->Data.Address.ProducerConsumer != ACPI_PRODUCER) 712 return AE_OK; 713 714 if (res->Data.Address.ResourceType != ACPI_MEMORY_RANGE && 715 res->Data.Address.ResourceType != ACPI_IO_RANGE) 716 return AE_OK; 717 718 if (res->Data.Address.ResourceType == ACPI_MEMORY_RANGE && 719 res->Data.Address.Info.Mem.Caching == ACPI_PREFETCHABLE_MEMORY) { 720 type = PCICONF_RESOURCE_PREFETCHABLE_MEM; 721 s = "prefetchable"; 722 } else if (res->Data.Address.ResourceType == ACPI_MEMORY_RANGE && 723 res->Data.Address.Info.Mem.Caching != ACPI_PREFETCHABLE_MEMORY) { 724 type = PCICONF_RESOURCE_MEM; 725 s = "non-prefetchable"; 726 } else { 727 KASSERT(res->Data.Address.ResourceType == ACPI_IO_RANGE); 728 type = PCICONF_RESOURCE_IO; 729 s = "i/o"; 730 } 731 732 switch (res->Type) { 733 case ACPI_RESOURCE_TYPE_ADDRESS16: 734 aprint_debug( 735 "MCFG: range 0x%04" PRIx16 " size %#" PRIx16 " (16-bit %s)\n", 736 res->Data.Address16.Address.Minimum, 737 res->Data.Address16.Address.AddressLength, 738 s); 739 addr = res->Data.Address16.Address.Minimum; 740 size = res->Data.Address16.Address.AddressLength; 741 break; 742 case ACPI_RESOURCE_TYPE_ADDRESS32: 743 aprint_debug( 744 "MCFG: range 0x%08" PRIx32 " size %#" PRIx32 " (32-bit %s)\n", 745 res->Data.Address32.Address.Minimum, 746 res->Data.Address32.Address.AddressLength, 747 s); 748 addr = res->Data.Address32.Address.Minimum; 749 size = res->Data.Address32.Address.AddressLength; 750 break; 751 case ACPI_RESOURCE_TYPE_ADDRESS64: 752 aprint_debug( 753 "MCFG: range 0x%016" PRIx64 " size %#" PRIx64 " (64-bit %s)\n", 754 res->Data.Address64.Address.Minimum, 755 res->Data.Address64.Address.AddressLength, 756 s); 757 addr = res->Data.Address64.Address.Minimum; 758 size = res->Data.Address64.Address.AddressLength; 759 break; 760 761 default: 762 return AE_OK; 763 } 764 765 error = pciconf_resource_add(pcires, type, addr, size); 766 767 return error == 0 ? AE_OK : AE_NO_MEMORY; 768 } 769 770 int 771 acpimcfg_configure_bus(device_t self, pci_chipset_tag_t pc, ACPI_HANDLE handle, 772 int bus, int cacheline_size) 773 { 774 struct pciconf_resources *pcires; 775 struct mcfg_segment *seg; 776 struct mcfg_bus *mb; 777 bus_space_handle_t bsh[256]; 778 bool bsh_mapped[256]; 779 int error, boff, b, d, f; 780 bus_addr_t baddr; 781 ACPI_STATUS rv; 782 783 seg = acpimcfg_get_segment(pc, bus); 784 if (seg == NULL) 785 return ENOENT; 786 787 pcires = pciconf_resource_init(); 788 789 /* 790 * Map config space for all possible busses and mark them valid during 791 * configuration so pci_configure_bus can access them through our chipset 792 * tag with acpimcfg_conf_read/write below. 793 */ 794 memset(bsh_mapped, 0, sizeof(bsh_mapped)); 795 for (b = seg->ms_bus_start; b <= seg->ms_bus_end; b++) { 796 boff = b - seg->ms_bus_start; 797 mb = &seg->ms_bus[boff]; 798 baddr = seg->ms_address + (b * ACPIMCFG_SIZE_PER_BUS); 799 800 /* Map extended configuration space of all dev/func. */ 801 error = bus_space_map(seg->ms_bst, baddr, ACPIMCFG_SIZE_PER_BUS, 0, 802 &bsh[b]); 803 if (error != 0) 804 goto cleanup; 805 bsh_mapped[b] = true; 806 for (d = 0; d < 32; d++) { 807 for (f = 0; f < 8; f++) { 808 error = bus_space_subregion(seg->ms_bst, bsh[b], 809 EXTCONF_OFFSET(d, f, 0), PCI_EXTCONF_SIZE, 810 &mb->bsh[d][f]); 811 if (error != 0) 812 break; 813 } 814 } 815 if (error != 0) 816 goto cleanup; 817 818 memset(mb->valid_devs, 0xff, sizeof(mb->valid_devs)); 819 } 820 821 rv = AcpiWalkResources(handle, "_CRS", acpimcfg_configure_bus_cb, 822 pcires); 823 if (ACPI_FAILURE(rv)) { 824 error = ENXIO; 825 goto cleanup; 826 } 827 828 error = pci_configure_bus(pc, pcires, bus, cacheline_size); 829 830 cleanup: 831 /* 832 * Unmap config space for the segment's busses. Valid devices will be 833 * re-mapped later on by acpimcfg_map_bus. 834 */ 835 for (b = seg->ms_bus_start; b <= seg->ms_bus_end; b++) { 836 boff = b - seg->ms_bus_start; 837 mb = &seg->ms_bus[boff]; 838 memset(mb->valid_devs, 0, sizeof(mb->valid_devs)); 839 840 if (bsh_mapped[b]) 841 bus_space_unmap(seg->ms_bst, bsh[b], ACPIMCFG_SIZE_PER_BUS); 842 } 843 844 pciconf_resource_fini(pcires); 845 846 return error; 847 } 848 #else 849 int 850 acpimcfg_configure_bus(device_t self, pci_chipset_tag_t pc, ACPI_HANDLE handle, 851 int bus, int cacheline_size) 852 { 853 return ENXIO; 854 } 855 #endif 856 857 int 858 acpimcfg_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t *data) 859 { 860 struct mcfg_segment *seg = NULL; 861 struct mcfg_bus *mb; 862 int bus, dev, func; 863 864 KASSERT(reg < PCI_EXTCONF_SIZE); 865 KASSERT((reg & 3) == 0); 866 867 if (!mcfg_inited) { 868 *data = -1; 869 return ENXIO; 870 } 871 872 pci_decompose_tag(pc, tag, &bus, &dev, &func); 873 874 seg = acpimcfg_get_segment(pc, bus); 875 if (seg == NULL) { 876 *data = -1; 877 return ERANGE; 878 } 879 880 mb = &seg->ms_bus[bus - seg->ms_bus_start]; 881 if (!PCIDEV_IS_VALID(mb, dev, func)) { 882 *data = -1; 883 return EINVAL; 884 } 885 if (!EXTCONF_IS_VALID(mb, dev, func) && reg >= PCI_CONF_SIZE) { 886 *data = -1; 887 return EINVAL; 888 } 889 890 *data = mcfg_ops->ao_read(seg->ms_bst, mb->bsh[dev][func], reg); 891 return 0; 892 } 893 894 int 895 acpimcfg_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t data) 896 { 897 struct mcfg_segment *seg = NULL; 898 struct mcfg_bus *mb; 899 int bus, dev, func; 900 901 KASSERT(reg < PCI_EXTCONF_SIZE); 902 KASSERT((reg & 3) == 0); 903 904 if (!mcfg_inited) 905 return ENXIO; 906 907 pci_decompose_tag(pc, tag, &bus, &dev, &func); 908 909 seg = acpimcfg_get_segment(pc, bus); 910 if (seg == NULL) 911 return ERANGE; 912 913 mb = &seg->ms_bus[bus - seg->ms_bus_start]; 914 if (!PCIDEV_IS_VALID(mb, dev, func)) 915 return EINVAL; 916 if (!EXTCONF_IS_VALID(mb, dev, func) && reg >= PCI_CONF_SIZE) 917 return EINVAL; 918 919 mcfg_ops->ao_write(seg->ms_bst, mb->bsh[dev][func], reg, data); 920 return 0; 921 } 922 923 bool 924 acpimcfg_conf_valid(pci_chipset_tag_t pc, pcitag_t tag, int reg) 925 { 926 struct mcfg_segment *seg = NULL; 927 struct mcfg_bus *mb; 928 int bus, dev, func; 929 930 if (!mcfg_inited) 931 return false; 932 933 pci_decompose_tag(pc, tag, &bus, &dev, &func); 934 935 seg = acpimcfg_get_segment(pc, bus); 936 if (seg == NULL) 937 return false; 938 939 mb = &seg->ms_bus[bus - seg->ms_bus_start]; 940 if (!PCIDEV_IS_VALID(mb, dev, func)) 941 return false; 942 if (!EXTCONF_IS_VALID(mb, dev, func) && reg >= PCI_CONF_SIZE) 943 return false; 944 945 return true; 946 } 947
Indexes created Mon Sep 22 10:09:38 GMT 2025