acpi_pcib_acpi.c revision 224254
1/*- 2 * Copyright (c) 2000 Michael Smith 3 * Copyright (c) 2000 BSDi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD: head/sys/dev/acpica/acpi_pcib_acpi.c 224254 2011-07-21 20:43:43Z jhb $"); 30 31#include "opt_acpi.h" 32#include <sys/param.h> 33#include <sys/bus.h> 34#include <sys/kernel.h> 35#include <sys/limits.h> 36#include <sys/malloc.h> 37#include <sys/module.h> 38#include <sys/rman.h> 39#include <sys/sysctl.h> 40 41#include <contrib/dev/acpica/include/acpi.h> 42#include <contrib/dev/acpica/include/accommon.h> 43 44#include <dev/acpica/acpivar.h> 45 46#include <machine/pci_cfgreg.h> 47#include <dev/pci/pcivar.h> 48#include <dev/pci/pcib_private.h> 49#include "pcib_if.h" 50 51#include <dev/acpica/acpi_pcibvar.h> 52 53/* Hooks for the ACPI CA debugging infrastructure. */ 54#define _COMPONENT ACPI_BUS 55ACPI_MODULE_NAME("PCI_ACPI") 56 57struct acpi_hpcib_softc { 58 device_t ap_dev; 59 ACPI_HANDLE ap_handle; 60 int ap_flags; 61 62 int ap_segment; /* analagous to Alpha 'hose' */ 63 int ap_bus; /* bios-assigned bus number */ 64 65 ACPI_BUFFER ap_prt; /* interrupt routing table */ 66#ifdef NEW_PCIB 67 struct pcib_host_resources ap_host_res; 68#endif 69}; 70 71static int acpi_pcib_acpi_probe(device_t bus); 72static int acpi_pcib_acpi_attach(device_t bus); 73static int acpi_pcib_read_ivar(device_t dev, device_t child, 74 int which, uintptr_t *result); 75static int acpi_pcib_write_ivar(device_t dev, device_t child, 76 int which, uintptr_t value); 77static uint32_t acpi_pcib_read_config(device_t dev, u_int bus, 78 u_int slot, u_int func, u_int reg, int bytes); 79static void acpi_pcib_write_config(device_t dev, u_int bus, 80 u_int slot, u_int func, u_int reg, uint32_t data, 81 int bytes); 82static int acpi_pcib_acpi_route_interrupt(device_t pcib, 83 device_t dev, int pin); 84static int acpi_pcib_alloc_msi(device_t pcib, device_t dev, 85 int count, int maxcount, int *irqs); 86static int acpi_pcib_map_msi(device_t pcib, device_t dev, 87 int irq, uint64_t *addr, uint32_t *data); 88static int acpi_pcib_alloc_msix(device_t pcib, device_t dev, 89 int *irq); 90static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev, 91 device_t child, int type, int *rid, 92 u_long start, u_long end, u_long count, 93 u_int flags); 94#ifdef NEW_PCIB 95static int acpi_pcib_acpi_adjust_resource(device_t dev, 96 device_t child, int type, struct resource *r, 97 u_long start, u_long end); 98#endif 99 100static device_method_t acpi_pcib_acpi_methods[] = { 101 /* Device interface */ 102 DEVMETHOD(device_probe, acpi_pcib_acpi_probe), 103 DEVMETHOD(device_attach, acpi_pcib_acpi_attach), 104 DEVMETHOD(device_shutdown, bus_generic_shutdown), 105 DEVMETHOD(device_suspend, bus_generic_suspend), 106 DEVMETHOD(device_resume, bus_generic_resume), 107 108 /* Bus interface */ 109 DEVMETHOD(bus_print_child, bus_generic_print_child), 110 DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar), 111 DEVMETHOD(bus_write_ivar, acpi_pcib_write_ivar), 112 DEVMETHOD(bus_alloc_resource, acpi_pcib_acpi_alloc_resource), 113#ifdef NEW_PCIB 114 DEVMETHOD(bus_adjust_resource, acpi_pcib_acpi_adjust_resource), 115#else 116 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), 117#endif 118 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 119 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 120 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 121 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 122 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 123 124 /* pcib interface */ 125 DEVMETHOD(pcib_maxslots, pcib_maxslots), 126 DEVMETHOD(pcib_read_config, acpi_pcib_read_config), 127 DEVMETHOD(pcib_write_config, acpi_pcib_write_config), 128 DEVMETHOD(pcib_route_interrupt, acpi_pcib_acpi_route_interrupt), 129 DEVMETHOD(pcib_alloc_msi, acpi_pcib_alloc_msi), 130 DEVMETHOD(pcib_release_msi, pcib_release_msi), 131 DEVMETHOD(pcib_alloc_msix, acpi_pcib_alloc_msix), 132 DEVMETHOD(pcib_release_msix, pcib_release_msix), 133 DEVMETHOD(pcib_map_msi, acpi_pcib_map_msi), 134 DEVMETHOD(pcib_power_for_sleep, acpi_pcib_power_for_sleep), 135 136 {0, 0} 137}; 138 139static devclass_t pcib_devclass; 140 141DEFINE_CLASS_0(pcib, acpi_pcib_acpi_driver, acpi_pcib_acpi_methods, 142 sizeof(struct acpi_hpcib_softc)); 143DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0); 144MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1); 145 146static int 147acpi_pcib_acpi_probe(device_t dev) 148{ 149 ACPI_DEVICE_INFO *devinfo; 150 ACPI_HANDLE h; 151 int root; 152 153 if (acpi_disabled("pcib") || (h = acpi_get_handle(dev)) == NULL || 154 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 155 return (ENXIO); 156 root = (devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0; 157 AcpiOsFree(devinfo); 158 if (!root || pci_cfgregopen() == 0) 159 return (ENXIO); 160 161 device_set_desc(dev, "ACPI Host-PCI bridge"); 162 return (0); 163} 164 165#ifdef NEW_PCIB 166static ACPI_STATUS 167acpi_pcib_producer_handler(ACPI_RESOURCE *res, void *context) 168{ 169 struct acpi_hpcib_softc *sc; 170 UINT64 length, min, max; 171 u_int flags; 172 int error, type; 173 174 sc = context; 175 switch (res->Type) { 176 case ACPI_RESOURCE_TYPE_START_DEPENDENT: 177 case ACPI_RESOURCE_TYPE_END_DEPENDENT: 178 panic("host bridge has depenedent resources"); 179 case ACPI_RESOURCE_TYPE_ADDRESS16: 180 case ACPI_RESOURCE_TYPE_ADDRESS32: 181 case ACPI_RESOURCE_TYPE_ADDRESS64: 182 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: 183 if (res->Data.Address.ProducerConsumer != ACPI_PRODUCER) 184 break; 185 switch (res->Type) { 186 case ACPI_RESOURCE_TYPE_ADDRESS16: 187 min = res->Data.Address16.Minimum; 188 max = res->Data.Address16.Maximum; 189 length = res->Data.Address16.AddressLength; 190 break; 191 case ACPI_RESOURCE_TYPE_ADDRESS32: 192 min = res->Data.Address32.Minimum; 193 max = res->Data.Address32.Maximum; 194 length = res->Data.Address32.AddressLength; 195 break; 196 case ACPI_RESOURCE_TYPE_ADDRESS64: 197 min = res->Data.Address64.Minimum; 198 max = res->Data.Address64.Maximum; 199 length = res->Data.Address64.AddressLength; 200 break; 201 default: 202 KASSERT(res->Type == 203 ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64, 204 ("should never happen")); 205 min = res->Data.ExtAddress64.Minimum; 206 max = res->Data.ExtAddress64.Maximum; 207 length = res->Data.ExtAddress64.AddressLength; 208 break; 209 } 210 if (length == 0) 211 break; 212 if (min + length - 1 != max && 213 (res->Data.Address.MinAddressFixed != ACPI_ADDRESS_FIXED || 214 res->Data.Address.MaxAddressFixed != ACPI_ADDRESS_FIXED)) 215 break; 216 flags = 0; 217 switch (res->Data.Address.ResourceType) { 218 case ACPI_MEMORY_RANGE: 219 type = SYS_RES_MEMORY; 220 if (res->Type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) { 221 if (res->Data.Address.Info.Mem.Caching == 222 ACPI_PREFETCHABLE_MEMORY) 223 flags |= RF_PREFETCHABLE; 224 } else { 225 /* 226 * XXX: Parse prefetch flag out of 227 * TypeSpecific. 228 */ 229 } 230 break; 231 case ACPI_IO_RANGE: 232 type = SYS_RES_IOPORT; 233 break; 234#ifdef PCI_RES_BUS 235 case ACPI_BUS_NUMBER_RANGE: 236 type = PCI_RES_BUS; 237 break; 238#endif 239 default: 240 return (AE_OK); 241 } 242 243 if (min + length - 1 != max) 244 device_printf(sc->ap_dev, 245 "Length mismatch for %d range: %jx vs %jx\n", type, 246 (uintmax_t)max - min + 1, (uintmax_t)length); 247#ifdef __i386__ 248 if (min > ULONG_MAX) { 249 device_printf(sc->ap_dev, 250 "Ignoring %d range above 4GB (%#jx-%#jx)\n", 251 type, (uintmax_t)min, (uintmax_t)max); 252 break; 253 } 254 if (max > ULONG_MAX) { 255 device_printf(sc->ap_dev, 256 "Truncating end of %d range above 4GB (%#jx-%#jx)\n", 257 type, (uintmax_t)min, (uintmax_t)max); 258 max = ULONG_MAX; 259 } 260#endif 261 error = pcib_host_res_decodes(&sc->ap_host_res, type, min, max, 262 flags); 263 if (error) 264 panic("Failed to manage %d range (%#jx-%#jx): %d", 265 type, (uintmax_t)min, (uintmax_t)max, error); 266 break; 267 default: 268 break; 269 } 270 return (AE_OK); 271} 272#endif 273 274static int 275acpi_pcib_acpi_attach(device_t dev) 276{ 277 struct acpi_hpcib_softc *sc; 278 ACPI_STATUS status; 279 static int bus0_seen = 0; 280 u_int addr, slot, func, busok; 281 uint8_t busno; 282 283 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 284 285 sc = device_get_softc(dev); 286 sc->ap_dev = dev; 287 sc->ap_handle = acpi_get_handle(dev); 288 289 /* 290 * Get our segment number by evaluating _SEG 291 * It's OK for this to not exist. 292 */ 293 status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment); 294 if (ACPI_FAILURE(status)) { 295 if (status != AE_NOT_FOUND) { 296 device_printf(dev, "could not evaluate _SEG - %s\n", 297 AcpiFormatException(status)); 298 return_VALUE (ENXIO); 299 } 300 /* If it's not found, assume 0. */ 301 sc->ap_segment = 0; 302 } 303 304#ifdef NEW_PCIB 305 /* 306 * Determine which address ranges this bridge decodes and setup 307 * resource managers for those ranges. 308 */ 309 if (pcib_host_res_init(sc->ap_dev, &sc->ap_host_res) != 0) 310 panic("failed to init hostb resources"); 311 if (!acpi_disabled("hostres")) { 312 status = AcpiWalkResources(sc->ap_handle, "_CRS", 313 acpi_pcib_producer_handler, sc); 314 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) 315 device_printf(sc->ap_dev, "failed to parse resources: %s\n", 316 AcpiFormatException(status)); 317 } 318#endif 319 320 /* 321 * Get our base bus number by evaluating _BBN. 322 * If this doesn't work, we assume we're bus number 0. 323 * 324 * XXX note that it may also not exist in the case where we are 325 * meant to use a private configuration space mechanism for this bus, 326 * so we should dig out our resources and check to see if we have 327 * anything like that. How do we do this? 328 * XXX If we have the requisite information, and if we don't think the 329 * default PCI configuration space handlers can deal with this bus, 330 * we should attach our own handler. 331 * XXX invoke _REG on this for the PCI config space address space? 332 * XXX It seems many BIOS's with multiple Host-PCI bridges do not set 333 * _BBN correctly. They set _BBN to zero for all bridges. Thus, 334 * if _BBN is zero and PCI bus 0 already exists, we try to read our 335 * bus number from the configuration registers at address _ADR. 336 * We only do this for domain/segment 0 in the hopes that this is 337 * only needed for old single-domain machines. 338 */ 339 status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus); 340 if (ACPI_FAILURE(status)) { 341 if (status != AE_NOT_FOUND) { 342 device_printf(dev, "could not evaluate _BBN - %s\n", 343 AcpiFormatException(status)); 344 return_VALUE (ENXIO); 345 } else { 346 /* If it's not found, assume 0. */ 347 sc->ap_bus = 0; 348 } 349 } 350 351 /* 352 * If this is segment 0, the bus is zero, and PCI bus 0 already 353 * exists, read the bus number via PCI config space. 354 */ 355 busok = 1; 356 if (sc->ap_segment == 0 && sc->ap_bus == 0 && bus0_seen) { 357 busok = 0; 358 status = acpi_GetInteger(sc->ap_handle, "_ADR", &addr); 359 if (ACPI_FAILURE(status)) { 360 if (status != AE_NOT_FOUND) { 361 device_printf(dev, "could not evaluate _ADR - %s\n", 362 AcpiFormatException(status)); 363 return_VALUE (ENXIO); 364 } else 365 device_printf(dev, "couldn't find _ADR\n"); 366 } else { 367 /* XXX: We assume bus 0. */ 368 slot = ACPI_ADR_PCI_SLOT(addr); 369 func = ACPI_ADR_PCI_FUNC(addr); 370 if (bootverbose) 371 device_printf(dev, "reading config registers from 0:%d:%d\n", 372 slot, func); 373 if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0) 374 device_printf(dev, "couldn't read bus number from cfg space\n"); 375 else { 376 sc->ap_bus = busno; 377 busok = 1; 378 } 379 } 380 } 381 382 /* 383 * If nothing else worked, hope that ACPI at least lays out the 384 * host-PCI bridges in order and that as a result our unit number 385 * is actually our bus number. There are several reasons this 386 * might not be true. 387 */ 388 if (busok == 0) { 389 sc->ap_bus = device_get_unit(dev); 390 device_printf(dev, "trying bus number %d\n", sc->ap_bus); 391 } 392 393 /* If this is bus 0 on segment 0, note that it has been seen already. */ 394 if (sc->ap_segment == 0 && sc->ap_bus == 0) 395 bus0_seen = 1; 396 397 return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus)); 398} 399 400/* 401 * Support for standard PCI bridge ivars. 402 */ 403static int 404acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 405{ 406 struct acpi_hpcib_softc *sc = device_get_softc(dev); 407 408 switch (which) { 409 case PCIB_IVAR_DOMAIN: 410 *result = sc->ap_segment; 411 return (0); 412 case PCIB_IVAR_BUS: 413 *result = sc->ap_bus; 414 return (0); 415 case ACPI_IVAR_HANDLE: 416 *result = (uintptr_t)sc->ap_handle; 417 return (0); 418 case ACPI_IVAR_FLAGS: 419 *result = (uintptr_t)sc->ap_flags; 420 return (0); 421 } 422 return (ENOENT); 423} 424 425static int 426acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 427{ 428 struct acpi_hpcib_softc *sc = device_get_softc(dev); 429 430 switch (which) { 431 case PCIB_IVAR_DOMAIN: 432 return (EINVAL); 433 case PCIB_IVAR_BUS: 434 sc->ap_bus = value; 435 return (0); 436 case ACPI_IVAR_HANDLE: 437 sc->ap_handle = (ACPI_HANDLE)value; 438 return (0); 439 case ACPI_IVAR_FLAGS: 440 sc->ap_flags = (int)value; 441 return (0); 442 } 443 return (ENOENT); 444} 445 446static uint32_t 447acpi_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func, 448 u_int reg, int bytes) 449{ 450 return (pci_cfgregread(bus, slot, func, reg, bytes)); 451} 452 453static void 454acpi_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func, 455 u_int reg, uint32_t data, int bytes) 456{ 457 pci_cfgregwrite(bus, slot, func, reg, data, bytes); 458} 459 460static int 461acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin) 462{ 463 struct acpi_hpcib_softc *sc = device_get_softc(pcib); 464 465 return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt)); 466} 467 468static int 469acpi_pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, 470 int *irqs) 471{ 472 device_t bus; 473 474 bus = device_get_parent(pcib); 475 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount, 476 irqs)); 477} 478 479static int 480acpi_pcib_alloc_msix(device_t pcib, device_t dev, int *irq) 481{ 482 device_t bus; 483 484 bus = device_get_parent(pcib); 485 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq)); 486} 487 488static int 489acpi_pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, 490 uint32_t *data) 491{ 492 device_t bus; 493 494 bus = device_get_parent(pcib); 495 return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data)); 496} 497 498struct resource * 499acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid, 500 u_long start, u_long end, u_long count, u_int flags) 501{ 502#ifdef NEW_PCIB 503 struct acpi_hpcib_softc *sc; 504#endif 505 506#if defined(__i386__) || defined(__amd64__) 507 start = hostb_alloc_start(type, start, end, count); 508#endif 509 510#ifdef NEW_PCIB 511 sc = device_get_softc(dev); 512 return (pcib_host_res_alloc(&sc->ap_host_res, child, type, rid, start, end, 513 count, flags)); 514#else 515 return (bus_generic_alloc_resource(dev, child, type, rid, start, end, 516 count, flags)); 517#endif 518} 519 520#ifdef NEW_PCIB 521int 522acpi_pcib_acpi_adjust_resource(device_t dev, device_t child, int type, 523 struct resource *r, u_long start, u_long end) 524{ 525 struct acpi_hpcib_softc *sc; 526 527 sc = device_get_softc(dev); 528 return (pcib_host_res_adjust(&sc->ap_host_res, child, type, r, start, 529 end)); 530} 531#endif 532