| 1 | /* $NetBSD: acpi_mcfg.c,v 1.4 2016/07/12 09:45:34 hannken Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (C) 2015 NONAKA Kimihiro <nonaka@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 <sys/cdefs.h> |
| 29 | __KERNEL_RCSID(0, "$NetBSD: acpi_mcfg.c,v 1.4 2016/07/12 09:45:34 hannken Exp $" ); |
| 30 | |
| 31 | #include <sys/param.h> |
| 32 | #include <sys/device.h> |
| 33 | #include <sys/kmem.h> |
| 34 | #include <sys/systm.h> |
| 35 | |
| 36 | #include <dev/pci/pcireg.h> |
| 37 | #include <dev/pci/pcivar.h> |
| 38 | #include <dev/pci/pcidevs.h> |
| 39 | |
| 40 | #include <dev/acpi/acpireg.h> |
| 41 | #include <dev/acpi/acpivar.h> |
| 42 | #include <dev/acpi/acpi_mcfg.h> |
| 43 | |
| 44 | #include "locators.h" |
| 45 | |
| 46 | #define _COMPONENT ACPI_RESOURCE_COMPONENT |
| 47 | ACPI_MODULE_NAME ("acpi_mcfg" ) |
| 48 | |
| 49 | #define EXTCONF_OFFSET(d, f, r) ((((d) * 8 + (f)) * PCI_EXTCONF_SIZE) + (r)) |
| 50 | |
| 51 | #define EXTCONF_SET_VALID(mb, d, f) ((mb)->valid_devs[(d)] |= __BIT((f))) |
| 52 | #define EXTCONF_SET_INVALID(mb, d, f) ((mb)->valid_devs[(d)] &= ~__BIT((f))) |
| 53 | #define EXTCONF_IS_VALID(mb, d, f) ((mb)->valid_devs[(d)] & __BIT((f))) |
| 54 | |
| 55 | struct mcfg_segment { |
| 56 | uint64_t ms_address; /* Base address */ |
| 57 | int ms_segment; /* Segment # */ |
| 58 | int ms_bus_start; /* Start bus # */ |
| 59 | int ms_bus_end; /* End bus # */ |
| 60 | bus_space_tag_t ms_bst; |
| 61 | struct mcfg_bus { |
| 62 | bus_space_handle_t bsh[32][8]; |
| 63 | uint8_t valid_devs[32]; |
| 64 | int valid_ndevs; |
| 65 | pcitag_t last_probed; |
| 66 | } *ms_bus; |
| 67 | }; |
| 68 | |
| 69 | static struct mcfg_segment *mcfg_segs; |
| 70 | static int mcfg_nsegs; |
| 71 | static ACPI_TABLE_MCFG *mcfg; |
| 72 | static int mcfg_inited; |
| 73 | static struct acpi_softc *acpi_sc; |
| 74 | |
| 75 | static const struct acpimcfg_ops mcfg_default_ops = { |
| 76 | .ao_validate = acpimcfg_default_validate, |
| 77 | |
| 78 | .ao_read = acpimcfg_default_read, |
| 79 | .ao_write = acpimcfg_default_write, |
| 80 | }; |
| 81 | static const struct acpimcfg_ops *mcfg_ops = &mcfg_default_ops; |
| 82 | |
| 83 | /* |
| 84 | * default operations. |
| 85 | */ |
| 86 | bool |
| 87 | acpimcfg_default_validate(uint64_t address, int bus_start, int *bus_end) |
| 88 | { |
| 89 | |
| 90 | /* Always Ok */ |
| 91 | return true; |
| 92 | } |
| 93 | |
| 94 | uint32_t |
| 95 | acpimcfg_default_read(bus_space_tag_t bst, bus_space_handle_t bsh, |
| 96 | bus_addr_t addr) |
| 97 | { |
| 98 | |
| 99 | return bus_space_read_4(bst, bsh, addr); |
| 100 | } |
| 101 | |
| 102 | void |
| 103 | acpimcfg_default_write(bus_space_tag_t bst, bus_space_handle_t bsh, |
| 104 | bus_addr_t addr, uint32_t data) |
| 105 | { |
| 106 | |
| 107 | bus_space_write_4(bst, bsh, addr, data); |
| 108 | } |
| 109 | |
| 110 | |
| 111 | /* |
| 112 | * Check MCFG memory region at system resource |
| 113 | */ |
| 114 | struct acpimcfg_memrange { |
| 115 | const char *hid; |
| 116 | uint64_t address; |
| 117 | int bus_start; |
| 118 | int bus_end; |
| 119 | bool found; |
| 120 | }; |
| 121 | |
| 122 | static ACPI_STATUS |
| 123 | acpimcfg_parse_callback(ACPI_RESOURCE *res, void *ctx) |
| 124 | { |
| 125 | struct acpimcfg_memrange *mr = ctx; |
| 126 | const char *type; |
| 127 | uint64_t size, mapaddr, mapsize; |
| 128 | int n; |
| 129 | |
| 130 | switch (res->Type) { |
| 131 | case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: |
| 132 | type = "FIXED_MEMORY32" ; |
| 133 | mapaddr = res->Data.FixedMemory32.Address; |
| 134 | mapsize = res->Data.FixedMemory32.AddressLength; |
| 135 | break; |
| 136 | |
| 137 | case ACPI_RESOURCE_TYPE_ADDRESS32: |
| 138 | /* XXX Only fixed size supported for now */ |
| 139 | if (res->Data.Address32.Address.AddressLength == 0 || |
| 140 | res->Data.Address32.ProducerConsumer != ACPI_CONSUMER) |
| 141 | goto out; |
| 142 | |
| 143 | if (res->Data.Address32.ResourceType != ACPI_MEMORY_RANGE) |
| 144 | goto out; |
| 145 | |
| 146 | if (res->Data.Address32.MinAddressFixed != ACPI_ADDRESS_FIXED || |
| 147 | res->Data.Address32.MaxAddressFixed != ACPI_ADDRESS_FIXED) |
| 148 | goto out; |
| 149 | |
| 150 | type = "ADDRESS32" ; |
| 151 | mapaddr = res->Data.Address32.Address.Minimum; |
| 152 | mapsize = res->Data.Address32.Address.AddressLength; |
| 153 | break; |
| 154 | |
| 155 | #ifdef _LP64 |
| 156 | case ACPI_RESOURCE_TYPE_ADDRESS64: |
| 157 | /* XXX Only fixed size supported for now */ |
| 158 | if (res->Data.Address64.Address.AddressLength == 0 || |
| 159 | res->Data.Address64.ProducerConsumer != ACPI_CONSUMER) |
| 160 | goto out; |
| 161 | |
| 162 | if (res->Data.Address64.ResourceType != ACPI_MEMORY_RANGE) |
| 163 | goto out; |
| 164 | |
| 165 | if (res->Data.Address64.MinAddressFixed != ACPI_ADDRESS_FIXED || |
| 166 | res->Data.Address64.MaxAddressFixed != ACPI_ADDRESS_FIXED) |
| 167 | goto out; |
| 168 | |
| 169 | type = "ADDRESS64" ; |
| 170 | mapaddr = res->Data.Address64.Address.Minimum; |
| 171 | mapsize = res->Data.Address64.Address.AddressLength; |
| 172 | break; |
| 173 | #endif |
| 174 | |
| 175 | default: |
| 176 | out: |
| 177 | aprint_debug_dev(acpi_sc->sc_dev, "MCFG: %s: Type=%d\n" , |
| 178 | mr->hid, res->Type); |
| 179 | return_ACPI_STATUS(AE_OK); |
| 180 | } |
| 181 | |
| 182 | aprint_debug_dev(acpi_sc->sc_dev, "MCFG: %s: Type=%d(%s), " |
| 183 | "Address=0x%016" PRIx64 ", Length=0x%016" PRIx64 "\n" , |
| 184 | mr->hid, res->Type, type, mapaddr, mapsize); |
| 185 | |
| 186 | if (mr->address < mapaddr || mr->address >= mapaddr + mapsize) |
| 187 | return_ACPI_STATUS(AE_OK); |
| 188 | |
| 189 | size = (mr->bus_end - mr->bus_start + 1) * ACPIMCFG_SIZE_PER_BUS; |
| 190 | |
| 191 | /* full map */ |
| 192 | if (mr->address + size <= mapaddr + mapsize) { |
| 193 | mr->found = true; |
| 194 | return_ACPI_STATUS(AE_CTRL_TERMINATE); |
| 195 | } |
| 196 | |
| 197 | /* partial map */ |
| 198 | n = (mapsize - (mr->address - mapaddr)) / ACPIMCFG_SIZE_PER_BUS; |
| 199 | /* bus_start == bus_end is not allowed. */ |
| 200 | if (n > 1) { |
| 201 | mr->bus_end = mr->bus_start + n - 1; |
| 202 | mr->found = true; |
| 203 | return_ACPI_STATUS(AE_CTRL_TERMINATE); |
| 204 | } |
| 205 | |
| 206 | aprint_debug_dev(acpi_sc->sc_dev, "MCFG: bus %d-%d, " |
| 207 | "address 0x%016" PRIx64 ": invalid size: request 0x%016" PRIx64 |
| 208 | ", actual 0x%016" PRIx64 "\n" , |
| 209 | mr->bus_start, mr->bus_end, mr->address, size, mapsize); |
| 210 | |
| 211 | return_ACPI_STATUS(AE_OK); |
| 212 | } |
| 213 | |
| 214 | static ACPI_STATUS |
| 215 | acpimcfg_check_system_resource(ACPI_HANDLE handle, UINT32 level, void *ctx, |
| 216 | void **retval) |
| 217 | { |
| 218 | struct acpimcfg_memrange *mr = ctx; |
| 219 | ACPI_STATUS status; |
| 220 | |
| 221 | status = AcpiWalkResources(handle, "_CRS" , acpimcfg_parse_callback, mr); |
| 222 | if (ACPI_FAILURE(status)) |
| 223 | return_ACPI_STATUS(status); |
| 224 | |
| 225 | if (mr->found) |
| 226 | return_ACPI_STATUS(AE_CTRL_TERMINATE); |
| 227 | |
| 228 | aprint_debug_dev(acpi_sc->sc_dev, "MCFG: %s: bus %d-%d, " |
| 229 | "address 0x%016" PRIx64 ": no valid region\n" , mr->hid, |
| 230 | mr->bus_start, mr->bus_end, mr->address); |
| 231 | |
| 232 | return_ACPI_STATUS(AE_OK); |
| 233 | } |
| 234 | |
| 235 | static bool |
| 236 | acpimcfg_find_system_resource(uint64_t address, int bus_start, int *bus_end) |
| 237 | { |
| 238 | static const char *system_resource_hid[] = { |
| 239 | "PNP0C01" , /* System Board */ |
| 240 | "PNP0C02" /* General ID for reserving resources */ |
| 241 | }; |
| 242 | struct acpimcfg_memrange mr; |
| 243 | ACPI_STATUS status; |
| 244 | int i; |
| 245 | |
| 246 | mr.address = address; |
| 247 | mr.bus_start = bus_start; |
| 248 | mr.bus_end = *bus_end; |
| 249 | mr.found = false; |
| 250 | |
| 251 | for (i = 0; i < __arraycount(system_resource_hid); i++) { |
| 252 | mr.hid = system_resource_hid[i]; |
| 253 | status = AcpiGetDevices(__UNCONST(system_resource_hid[i]), |
| 254 | acpimcfg_check_system_resource, &mr, NULL); |
| 255 | if (ACPI_FAILURE(status)) |
| 256 | continue; |
| 257 | if (mr.found) { |
| 258 | *bus_end = mr.bus_end; |
| 259 | return true; |
| 260 | } |
| 261 | } |
| 262 | return false; |
| 263 | } |
| 264 | |
| 265 | |
| 266 | /* |
| 267 | * ACPI MCFG |
| 268 | */ |
| 269 | void |
| 270 | acpimcfg_probe(struct acpi_softc *sc) |
| 271 | { |
| 272 | ACPI_MCFG_ALLOCATION *ama; |
| 273 | ACPI_STATUS status; |
| 274 | uint32_t offset; |
| 275 | int i, nsegs; |
| 276 | |
| 277 | if (acpi_sc != NULL) |
| 278 | panic("acpi_sc != NULL" ); |
| 279 | acpi_sc = sc; |
| 280 | |
| 281 | status = AcpiGetTable(ACPI_SIG_MCFG, 0, (ACPI_TABLE_HEADER **)&mcfg); |
| 282 | if (ACPI_FAILURE(status)) { |
| 283 | mcfg = NULL; |
| 284 | return; |
| 285 | } |
| 286 | |
| 287 | nsegs = 0; |
| 288 | offset = sizeof(ACPI_TABLE_MCFG); |
| 289 | ama = ACPI_ADD_PTR(ACPI_MCFG_ALLOCATION, mcfg, offset); |
| 290 | for (i = 0; offset < mcfg->Header.Length; i++) { |
| 291 | aprint_debug_dev(sc->sc_dev, |
| 292 | "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 "\n" , |
| 293 | ama->PciSegment, ama->StartBusNumber, ama->EndBusNumber, |
| 294 | ama->Address); |
| 295 | nsegs++; |
| 296 | offset += sizeof(ACPI_MCFG_ALLOCATION); |
| 297 | ama = ACPI_ADD_PTR(ACPI_MCFG_ALLOCATION, ama, offset); |
| 298 | } |
| 299 | if (nsegs == 0) { |
| 300 | mcfg = NULL; |
| 301 | return; |
| 302 | } |
| 303 | |
| 304 | mcfg_segs = kmem_zalloc(sizeof(*mcfg_segs) * nsegs, KM_SLEEP); |
| 305 | mcfg_nsegs = nsegs; |
| 306 | } |
| 307 | |
| 308 | int |
| 309 | acpimcfg_init(bus_space_tag_t memt, const struct acpimcfg_ops *ops) |
| 310 | { |
| 311 | ACPI_MCFG_ALLOCATION *ama; |
| 312 | struct mcfg_segment *seg; |
| 313 | uint32_t offset; |
| 314 | int i, n, nsegs, bus_end; |
| 315 | |
| 316 | if (mcfg == NULL) |
| 317 | return ENXIO; |
| 318 | |
| 319 | if (mcfg_inited) |
| 320 | return 0; |
| 321 | |
| 322 | if (ops != NULL) |
| 323 | mcfg_ops = ops; |
| 324 | |
| 325 | nsegs = 0; |
| 326 | offset = sizeof(ACPI_TABLE_MCFG); |
| 327 | ama = ACPI_ADD_PTR(ACPI_MCFG_ALLOCATION, mcfg, offset); |
| 328 | for (i = 0; offset < mcfg->Header.Length; i++) { |
| 329 | #ifndef _LP64 |
| 330 | if (ama->Address >= 0x100000000ULL) { |
| 331 | aprint_debug_dev(acpi_sc->sc_dev, |
| 332 | "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 |
| 333 | ": ignore (64bit address)\n" , ama->PciSegment, |
| 334 | ama->StartBusNumber, ama->EndBusNumber, |
| 335 | ama->Address); |
| 336 | goto next; |
| 337 | } |
| 338 | #endif |
| 339 | /* |
| 340 | * Some (broken?) BIOSen have an MCFG table for an empty |
| 341 | * bus range. Ignore those tables. |
| 342 | */ |
| 343 | if (ama->StartBusNumber == ama->EndBusNumber) { |
| 344 | aprint_debug_dev(acpi_sc->sc_dev, |
| 345 | "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 |
| 346 | ": ignore (bus %d == %d)\n" , ama->PciSegment, |
| 347 | ama->StartBusNumber, ama->EndBusNumber, |
| 348 | ama->Address, ama->StartBusNumber, |
| 349 | ama->EndBusNumber); |
| 350 | goto next; |
| 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 | if (ama->PciSegment != 0) { |
| 388 | aprint_debug_dev(acpi_sc->sc_dev, |
| 389 | "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 |
| 390 | ": ignore (non PCI segment 0)\n" , ama->PciSegment, |
| 391 | ama->StartBusNumber, bus_end, ama->Address); |
| 392 | goto next; |
| 393 | } |
| 394 | |
| 395 | seg = &mcfg_segs[nsegs++]; |
| 396 | seg->ms_address = ama->Address; |
| 397 | seg->ms_segment = ama->PciSegment; |
| 398 | seg->ms_bus_start = ama->StartBusNumber; |
| 399 | seg->ms_bus_end = bus_end; |
| 400 | seg->ms_bst = memt; |
| 401 | n = seg->ms_bus_end - seg->ms_bus_start + 1; |
| 402 | seg->ms_bus = kmem_zalloc(sizeof(*seg->ms_bus) * n, KM_SLEEP); |
| 403 | |
| 404 | next: |
| 405 | offset += sizeof(ACPI_MCFG_ALLOCATION); |
| 406 | ama = ACPI_ADD_PTR(ACPI_MCFG_ALLOCATION, ama, offset); |
| 407 | } |
| 408 | if (nsegs == 0) |
| 409 | return ENOENT; |
| 410 | |
| 411 | for (i = 0; i < nsegs; i++) { |
| 412 | seg = &mcfg_segs[i]; |
| 413 | aprint_verbose_dev(acpi_sc->sc_dev, |
| 414 | "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 "\n" , |
| 415 | seg->ms_segment, seg->ms_bus_start, seg->ms_bus_end, |
| 416 | seg->ms_address); |
| 417 | } |
| 418 | |
| 419 | /* Update # of segment */ |
| 420 | mcfg_nsegs = nsegs; |
| 421 | mcfg_inited = true; |
| 422 | |
| 423 | return 0; |
| 424 | } |
| 425 | |
| 426 | static int |
| 427 | acpimcfg_ext_conf_is_aliased(pci_chipset_tag_t pc, pcitag_t tag) |
| 428 | { |
| 429 | pcireg_t id; |
| 430 | int i; |
| 431 | |
| 432 | id = pci_conf_read(pc, tag, PCI_ID_REG); |
| 433 | for (i = PCI_CONF_SIZE; i < PCI_EXTCONF_SIZE; i += PCI_CONF_SIZE) { |
| 434 | if (pci_conf_read(pc, tag, i) != id) |
| 435 | return false; |
| 436 | } |
| 437 | return true; |
| 438 | } |
| 439 | |
| 440 | static struct mcfg_segment * |
| 441 | acpimcfg_get_segment(int bus) |
| 442 | { |
| 443 | struct mcfg_segment *seg; |
| 444 | int i; |
| 445 | |
| 446 | for (i = 0; i < mcfg_nsegs; i++) { |
| 447 | seg = &mcfg_segs[i]; |
| 448 | if (bus >= seg->ms_bus_start && bus <= seg->ms_bus_end) |
| 449 | return seg; |
| 450 | } |
| 451 | return NULL; |
| 452 | } |
| 453 | |
| 454 | static int |
| 455 | acpimcfg_device_probe(const struct pci_attach_args *pa) |
| 456 | { |
| 457 | pci_chipset_tag_t pc = pa->pa_pc; |
| 458 | struct mcfg_segment *seg; |
| 459 | struct mcfg_bus *mb; |
| 460 | pcitag_t tag; |
| 461 | pcireg_t reg; |
| 462 | int bus = pa->pa_bus; |
| 463 | int dev = pa->pa_device; |
| 464 | int func = pa->pa_function; |
| 465 | int last_dev, last_func, end_func; |
| 466 | int alias = 0; |
| 467 | int i, j; |
| 468 | |
| 469 | seg = acpimcfg_get_segment(bus); |
| 470 | if (seg == NULL) |
| 471 | return 0; |
| 472 | |
| 473 | mb = &seg->ms_bus[bus - seg->ms_bus_start]; |
| 474 | tag = pci_make_tag(pc, bus, dev, func); |
| 475 | |
| 476 | /* Mark invalid between last probed device to probed device. */ |
| 477 | pci_decompose_tag(pc, mb->last_probed, NULL, &last_dev, &last_func); |
| 478 | if (dev != 0 || func != 0) { |
| 479 | for (i = last_dev; i <= dev; i++) { |
| 480 | end_func = (i == dev) ? func : 8; |
| 481 | for (j = last_func; j < end_func; j++) { |
| 482 | if (i == last_dev && j == last_func) |
| 483 | continue; |
| 484 | EXTCONF_SET_INVALID(mb, i, j); |
| 485 | } |
| 486 | last_func = 0; |
| 487 | } |
| 488 | } |
| 489 | mb->last_probed = tag; |
| 490 | |
| 491 | /* Probe extended configuration space. */ |
| 492 | if (((reg = pci_conf_read(pc, tag, PCI_CONF_SIZE)) == (pcireg_t)-1) || |
| 493 | (reg == 0) || (alias = acpimcfg_ext_conf_is_aliased(pc, tag))) { |
| 494 | aprint_debug_dev(acpi_sc->sc_dev, |
| 495 | "MCFG: %03d:%02d:%d: invalid config space " |
| 496 | "(cfg[0x%03x]=0x%08x, alias=%s)\n" , bus, dev, func, |
| 497 | PCI_CONF_SIZE, reg, alias ? "true" : "false" ); |
| 498 | EXTCONF_SET_INVALID(mb, dev, func); |
| 499 | } else { |
| 500 | aprint_debug_dev(acpi_sc->sc_dev, |
| 501 | "MCFG: %03d:%02d:%d: Ok (cfg[0x%03x]=0x%08x)\n" , |
| 502 | bus, dev, func, PCI_CONF_SIZE, reg); |
| 503 | mb->valid_ndevs++; |
| 504 | } |
| 505 | |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | static void |
| 510 | acpimcfg_scan_bus(struct pci_softc *sc, pci_chipset_tag_t pc, int bus) |
| 511 | { |
| 512 | static const int wildcard[PCICF_NLOCS] = { |
| 513 | PCICF_DEV_DEFAULT, PCICF_FUNCTION_DEFAULT |
| 514 | }; |
| 515 | |
| 516 | sc->sc_bus = bus; /* XXX */ |
| 517 | |
| 518 | pci_enumerate_bus(sc, wildcard, acpimcfg_device_probe, NULL); |
| 519 | } |
| 520 | |
| 521 | int |
| 522 | acpimcfg_map_bus(device_t self, pci_chipset_tag_t pc, int bus) |
| 523 | { |
| 524 | struct pci_softc *sc = device_private(self); |
| 525 | struct mcfg_segment *seg = NULL; |
| 526 | struct mcfg_bus *mb; |
| 527 | bus_space_handle_t bsh; |
| 528 | bus_addr_t baddr; |
| 529 | pcitag_t tag; |
| 530 | pcireg_t reg; |
| 531 | bool is_e7520_mch; |
| 532 | int boff; |
| 533 | int last_dev, last_func; |
| 534 | int i, j; |
| 535 | int error; |
| 536 | |
| 537 | if (!mcfg_inited) |
| 538 | return ENXIO; |
| 539 | |
| 540 | seg = acpimcfg_get_segment(bus); |
| 541 | if (seg == NULL) |
| 542 | return ENOENT; |
| 543 | |
| 544 | boff = bus - seg->ms_bus_start; |
| 545 | if (seg->ms_bus[boff].valid_ndevs > 0) |
| 546 | return 0; |
| 547 | |
| 548 | mb = &seg->ms_bus[boff]; |
| 549 | baddr = seg->ms_address + (boff * ACPIMCFG_SIZE_PER_BUS); |
| 550 | |
| 551 | /* Map extended configration space of all dev/func. */ |
| 552 | error = bus_space_map(seg->ms_bst, baddr, ACPIMCFG_SIZE_PER_BUS, 0, |
| 553 | &bsh); |
| 554 | if (error != 0) |
| 555 | return error; |
| 556 | for (i = 0; i < 32; i++) { |
| 557 | for (j = 0; j < 8; j++) { |
| 558 | error = bus_space_subregion(seg->ms_bst, bsh, |
| 559 | EXTCONF_OFFSET(i, j, 0), PCI_EXTCONF_SIZE, |
| 560 | &mb->bsh[i][j]); |
| 561 | if (error != 0) |
| 562 | break; |
| 563 | } |
| 564 | } |
| 565 | if (error != 0) |
| 566 | return error; |
| 567 | |
| 568 | aprint_debug("\n" ); |
| 569 | |
| 570 | /* Probe extended configuration space of all devices. */ |
| 571 | memset(mb->valid_devs, 0xff, sizeof(mb->valid_devs)); |
| 572 | mb->valid_ndevs = 0; |
| 573 | mb->last_probed = pci_make_tag(pc, bus, 0, 0); |
| 574 | |
| 575 | /* |
| 576 | * On an Intel E7520 we have to temporarily disable |
| 577 | * Enhanced Config Access error detection and reporting |
| 578 | * by setting the appropriate error mask in HI_ERRMASK register. |
| 579 | * |
| 580 | * See "Intel E7520 Memory Controller Hub (MCH) Datasheet", |
| 581 | * Document 303006-002, pg. 82 |
| 582 | */ |
| 583 | tag = pci_make_tag(pc, 0, 0, 1); |
| 584 | reg = pci_conf_read(pc, tag, PCI_ID_REG); |
| 585 | is_e7520_mch = (reg == |
| 586 | PCI_ID_CODE(PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_E7525_MCHER)); |
| 587 | if (is_e7520_mch) { |
| 588 | reg = pci_conf_read(pc, tag, 0x54); |
| 589 | pci_conf_write(pc, tag, 0x54, reg | 0x20); |
| 590 | } |
| 591 | |
| 592 | acpimcfg_scan_bus(sc, pc, bus); |
| 593 | |
| 594 | if (is_e7520_mch) { |
| 595 | pci_conf_write(pc, tag, 0x54, reg); |
| 596 | } |
| 597 | |
| 598 | /* Unmap extended configration space of all dev/func. */ |
| 599 | bus_space_unmap(seg->ms_bst, bsh, ACPIMCFG_SIZE_PER_BUS); |
| 600 | memset(mb->bsh, 0, sizeof(mb->bsh)); |
| 601 | |
| 602 | if (mb->valid_ndevs == 0) { |
| 603 | aprint_debug_dev(acpi_sc->sc_dev, |
| 604 | "MCFG: bus %d: no valid devices.\n" , bus); |
| 605 | memset(mb->valid_devs, 0, sizeof(mb->valid_devs)); |
| 606 | goto out; |
| 607 | } |
| 608 | |
| 609 | /* Mark invalid on remaining all devices. */ |
| 610 | pci_decompose_tag(pc, mb->last_probed, NULL, &last_dev, &last_func); |
| 611 | for (i = last_dev; i < 32; i++) { |
| 612 | for (j = last_func; j < 8; j++) { |
| 613 | if (i == last_dev && j == last_func) { |
| 614 | /* Don't mark invalid to last probed device. */ |
| 615 | continue; |
| 616 | } |
| 617 | EXTCONF_SET_INVALID(mb, i, j); |
| 618 | } |
| 619 | last_func = 0; |
| 620 | } |
| 621 | |
| 622 | /* Map extended configuration space per dev/func. */ |
| 623 | for (i = 0; i < 32; i++) { |
| 624 | for (j = 0; j < 8; j++) { |
| 625 | if (!EXTCONF_IS_VALID(mb, i, j)) |
| 626 | continue; |
| 627 | error = bus_space_map(seg->ms_bst, |
| 628 | baddr + EXTCONF_OFFSET(i, j, 0), PCI_EXTCONF_SIZE, |
| 629 | 0, &mb->bsh[i][j]); |
| 630 | if (error != 0) { |
| 631 | /* Unmap all handles when map failed. */ |
| 632 | do { |
| 633 | while (--j >= 0) { |
| 634 | if (!EXTCONF_IS_VALID(mb, i, j)) |
| 635 | continue; |
| 636 | bus_space_unmap(seg->ms_bst, |
| 637 | mb->bsh[i][j], |
| 638 | PCI_EXTCONF_SIZE); |
| 639 | } |
| 640 | j = 8; |
| 641 | } while (--i >= 0); |
| 642 | memset(mb->valid_devs, 0, |
| 643 | sizeof(mb->valid_devs)); |
| 644 | goto out; |
| 645 | } |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | aprint_debug_dev(acpi_sc->sc_dev, "MCFG: bus %d: valid devices\n" , bus); |
| 650 | for (i = 0; i < 32; i++) { |
| 651 | for (j = 0; j < 8; j++) { |
| 652 | if (EXTCONF_IS_VALID(mb, i, j)) { |
| 653 | aprint_debug_dev(acpi_sc->sc_dev, |
| 654 | "MCFG: %03d:%02d:%d\n" , bus, i, j); |
| 655 | } |
| 656 | } |
| 657 | } |
| 658 | |
| 659 | error = 0; |
| 660 | out: |
| 661 | aprint_debug_dev(acpi_sc->sc_dev, "%s done" , __func__); |
| 662 | |
| 663 | return error; |
| 664 | } |
| 665 | |
| 666 | int |
| 667 | acpimcfg_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t *data) |
| 668 | { |
| 669 | struct mcfg_segment *seg = NULL; |
| 670 | struct mcfg_bus *mb; |
| 671 | int bus, dev, func; |
| 672 | |
| 673 | KASSERT(reg < PCI_EXTCONF_SIZE); |
| 674 | KASSERT((reg & 3) == 0); |
| 675 | |
| 676 | if (!mcfg_inited) { |
| 677 | *data = -1; |
| 678 | return ENXIO; |
| 679 | } |
| 680 | |
| 681 | pci_decompose_tag(pc, tag, &bus, &dev, &func); |
| 682 | |
| 683 | seg = acpimcfg_get_segment(bus); |
| 684 | if (seg == NULL) { |
| 685 | *data = -1; |
| 686 | return ERANGE; |
| 687 | } |
| 688 | |
| 689 | mb = &seg->ms_bus[bus - seg->ms_bus_start]; |
| 690 | if (!EXTCONF_IS_VALID(mb, dev, func)) { |
| 691 | *data = -1; |
| 692 | return EINVAL; |
| 693 | } |
| 694 | |
| 695 | *data = mcfg_ops->ao_read(seg->ms_bst, mb->bsh[dev][func], reg); |
| 696 | return 0; |
| 697 | } |
| 698 | |
| 699 | int |
| 700 | acpimcfg_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t data) |
| 701 | { |
| 702 | struct mcfg_segment *seg = NULL; |
| 703 | struct mcfg_bus *mb; |
| 704 | int bus, dev, func; |
| 705 | |
| 706 | KASSERT(reg < PCI_EXTCONF_SIZE); |
| 707 | KASSERT((reg & 3) == 0); |
| 708 | |
| 709 | if (!mcfg_inited) |
| 710 | return ENXIO; |
| 711 | |
| 712 | pci_decompose_tag(pc, tag, &bus, &dev, &func); |
| 713 | |
| 714 | seg = acpimcfg_get_segment(bus); |
| 715 | if (seg == NULL) |
| 716 | return ERANGE; |
| 717 | |
| 718 | mb = &seg->ms_bus[bus - seg->ms_bus_start]; |
| 719 | if (!EXTCONF_IS_VALID(mb, dev, func)) |
| 720 | return EINVAL; |
| 721 | |
| 722 | mcfg_ops->ao_write(seg->ms_bst, mb->bsh[dev][func], reg, data); |
| 723 | return 0; |
| 724 | } |
| 725 | |