acpi_pcib_acpi.c revision 221336
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 221336 2011-05-02 19:02:30Z 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/malloc.h> 36#include <sys/module.h> 37#include <sys/sysctl.h> 38 39#include <contrib/dev/acpica/include/acpi.h> 40#include <contrib/dev/acpica/include/accommon.h> 41 42#include <dev/acpica/acpivar.h> 43 44#include <machine/pci_cfgreg.h> 45#include <dev/pci/pcivar.h> 46#include <dev/pci/pcib_private.h> 47#include "pcib_if.h" 48 49#include <dev/acpica/acpi_pcibvar.h> 50 51/* Hooks for the ACPI CA debugging infrastructure. */ 52#define _COMPONENT ACPI_BUS 53ACPI_MODULE_NAME("PCI_ACPI") 54 55struct acpi_hpcib_softc { 56 device_t ap_dev; 57 ACPI_HANDLE ap_handle; 58 int ap_flags; 59 60 int ap_segment; /* analagous to Alpha 'hose' */ 61 int ap_bus; /* bios-assigned bus number */ 62 63 ACPI_BUFFER ap_prt; /* interrupt routing table */ 64}; 65 66static int acpi_pcib_acpi_probe(device_t bus); 67static int acpi_pcib_acpi_attach(device_t bus); 68static int acpi_pcib_read_ivar(device_t dev, device_t child, 69 int which, uintptr_t *result); 70static int acpi_pcib_write_ivar(device_t dev, device_t child, 71 int which, uintptr_t value); 72static uint32_t acpi_pcib_read_config(device_t dev, u_int bus, 73 u_int slot, u_int func, u_int reg, int bytes); 74static void acpi_pcib_write_config(device_t dev, u_int bus, 75 u_int slot, u_int func, u_int reg, uint32_t data, 76 int bytes); 77static int acpi_pcib_acpi_route_interrupt(device_t pcib, 78 device_t dev, int pin); 79static int acpi_pcib_alloc_msi(device_t pcib, device_t dev, 80 int count, int maxcount, int *irqs); 81static int acpi_pcib_map_msi(device_t pcib, device_t dev, 82 int irq, uint64_t *addr, uint32_t *data); 83static int acpi_pcib_alloc_msix(device_t pcib, device_t dev, 84 int *irq); 85static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev, 86 device_t child, int type, int *rid, 87 u_long start, u_long end, u_long count, 88 u_int flags); 89 90static device_method_t acpi_pcib_acpi_methods[] = { 91 /* Device interface */ 92 DEVMETHOD(device_probe, acpi_pcib_acpi_probe), 93 DEVMETHOD(device_attach, acpi_pcib_acpi_attach), 94 DEVMETHOD(device_shutdown, bus_generic_shutdown), 95 DEVMETHOD(device_suspend, bus_generic_suspend), 96 DEVMETHOD(device_resume, bus_generic_resume), 97 98 /* Bus interface */ 99 DEVMETHOD(bus_print_child, bus_generic_print_child), 100 DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar), 101 DEVMETHOD(bus_write_ivar, acpi_pcib_write_ivar), 102 DEVMETHOD(bus_alloc_resource, acpi_pcib_acpi_alloc_resource), 103 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), 104 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 105 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 106 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 107 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 108 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 109 110 /* pcib interface */ 111 DEVMETHOD(pcib_maxslots, pcib_maxslots), 112 DEVMETHOD(pcib_read_config, acpi_pcib_read_config), 113 DEVMETHOD(pcib_write_config, acpi_pcib_write_config), 114 DEVMETHOD(pcib_route_interrupt, acpi_pcib_acpi_route_interrupt), 115 DEVMETHOD(pcib_alloc_msi, acpi_pcib_alloc_msi), 116 DEVMETHOD(pcib_release_msi, pcib_release_msi), 117 DEVMETHOD(pcib_alloc_msix, acpi_pcib_alloc_msix), 118 DEVMETHOD(pcib_release_msix, pcib_release_msix), 119 DEVMETHOD(pcib_map_msi, acpi_pcib_map_msi), 120 DEVMETHOD(pcib_power_for_sleep, acpi_pcib_power_for_sleep), 121 122 {0, 0} 123}; 124 125static devclass_t pcib_devclass; 126 127DEFINE_CLASS_0(pcib, acpi_pcib_acpi_driver, acpi_pcib_acpi_methods, 128 sizeof(struct acpi_hpcib_softc)); 129DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0); 130MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1); 131 132static int 133acpi_pcib_acpi_probe(device_t dev) 134{ 135 ACPI_DEVICE_INFO *devinfo; 136 ACPI_HANDLE h; 137 int root; 138 139 if (acpi_disabled("pcib") || (h = acpi_get_handle(dev)) == NULL || 140 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 141 return (ENXIO); 142 root = (devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0; 143 AcpiOsFree(devinfo); 144 if (!root || pci_cfgregopen() == 0) 145 return (ENXIO); 146 147 device_set_desc(dev, "ACPI Host-PCI bridge"); 148 return (0); 149} 150 151static int 152acpi_pcib_acpi_attach(device_t dev) 153{ 154 struct acpi_hpcib_softc *sc; 155 ACPI_STATUS status; 156 static int bus0_seen = 0; 157 u_int addr, slot, func, busok; 158 uint8_t busno; 159 160 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 161 162 sc = device_get_softc(dev); 163 sc->ap_dev = dev; 164 sc->ap_handle = acpi_get_handle(dev); 165 166 /* 167 * Get our segment number by evaluating _SEG 168 * It's OK for this to not exist. 169 */ 170 status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment); 171 if (ACPI_FAILURE(status)) { 172 if (status != AE_NOT_FOUND) { 173 device_printf(dev, "could not evaluate _SEG - %s\n", 174 AcpiFormatException(status)); 175 return_VALUE (ENXIO); 176 } 177 /* If it's not found, assume 0. */ 178 sc->ap_segment = 0; 179 } 180 181 /* 182 * Get our base bus number by evaluating _BBN. 183 * If this doesn't work, we assume we're bus number 0. 184 * 185 * XXX note that it may also not exist in the case where we are 186 * meant to use a private configuration space mechanism for this bus, 187 * so we should dig out our resources and check to see if we have 188 * anything like that. How do we do this? 189 * XXX If we have the requisite information, and if we don't think the 190 * default PCI configuration space handlers can deal with this bus, 191 * we should attach our own handler. 192 * XXX invoke _REG on this for the PCI config space address space? 193 * XXX It seems many BIOS's with multiple Host-PCI bridges do not set 194 * _BBN correctly. They set _BBN to zero for all bridges. Thus, 195 * if _BBN is zero and PCI bus 0 already exists, we try to read our 196 * bus number from the configuration registers at address _ADR. 197 * We only do this for domain/segment 0 in the hopes that this is 198 * only needed for old single-domain machines. 199 */ 200 status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus); 201 if (ACPI_FAILURE(status)) { 202 if (status != AE_NOT_FOUND) { 203 device_printf(dev, "could not evaluate _BBN - %s\n", 204 AcpiFormatException(status)); 205 return_VALUE (ENXIO); 206 } else { 207 /* If it's not found, assume 0. */ 208 sc->ap_bus = 0; 209 } 210 } 211 212 /* 213 * If this is segment 0, the bus is zero, and PCI bus 0 already 214 * exists, read the bus number via PCI config space. 215 */ 216 busok = 1; 217 if (sc->ap_segment == 0 && sc->ap_bus == 0 && bus0_seen) { 218 busok = 0; 219 status = acpi_GetInteger(sc->ap_handle, "_ADR", &addr); 220 if (ACPI_FAILURE(status)) { 221 if (status != AE_NOT_FOUND) { 222 device_printf(dev, "could not evaluate _ADR - %s\n", 223 AcpiFormatException(status)); 224 return_VALUE (ENXIO); 225 } else 226 device_printf(dev, "couldn't find _ADR\n"); 227 } else { 228 /* XXX: We assume bus 0. */ 229 slot = ACPI_ADR_PCI_SLOT(addr); 230 func = ACPI_ADR_PCI_FUNC(addr); 231 if (bootverbose) 232 device_printf(dev, "reading config registers from 0:%d:%d\n", 233 slot, func); 234 if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0) 235 device_printf(dev, "couldn't read bus number from cfg space\n"); 236 else { 237 sc->ap_bus = busno; 238 busok = 1; 239 } 240 } 241 } 242 243 /* 244 * If nothing else worked, hope that ACPI at least lays out the 245 * host-PCI bridges in order and that as a result our unit number 246 * is actually our bus number. There are several reasons this 247 * might not be true. 248 */ 249 if (busok == 0) { 250 sc->ap_bus = device_get_unit(dev); 251 device_printf(dev, "trying bus number %d\n", sc->ap_bus); 252 } 253 254 /* If this is bus 0 on segment 0, note that it has been seen already. */ 255 if (sc->ap_segment == 0 && sc->ap_bus == 0) 256 bus0_seen = 1; 257 258 return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus)); 259} 260 261/* 262 * Support for standard PCI bridge ivars. 263 */ 264static int 265acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 266{ 267 struct acpi_hpcib_softc *sc = device_get_softc(dev); 268 269 switch (which) { 270 case PCIB_IVAR_DOMAIN: 271 *result = sc->ap_segment; 272 return (0); 273 case PCIB_IVAR_BUS: 274 *result = sc->ap_bus; 275 return (0); 276 case ACPI_IVAR_HANDLE: 277 *result = (uintptr_t)sc->ap_handle; 278 return (0); 279 case ACPI_IVAR_FLAGS: 280 *result = (uintptr_t)sc->ap_flags; 281 return (0); 282 } 283 return (ENOENT); 284} 285 286static int 287acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 288{ 289 struct acpi_hpcib_softc *sc = device_get_softc(dev); 290 291 switch (which) { 292 case PCIB_IVAR_DOMAIN: 293 return (EINVAL); 294 case PCIB_IVAR_BUS: 295 sc->ap_bus = value; 296 return (0); 297 case ACPI_IVAR_HANDLE: 298 sc->ap_handle = (ACPI_HANDLE)value; 299 return (0); 300 case ACPI_IVAR_FLAGS: 301 sc->ap_flags = (int)value; 302 return (0); 303 } 304 return (ENOENT); 305} 306 307static uint32_t 308acpi_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func, 309 u_int reg, int bytes) 310{ 311 return (pci_cfgregread(bus, slot, func, reg, bytes)); 312} 313 314static void 315acpi_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func, 316 u_int reg, uint32_t data, int bytes) 317{ 318 pci_cfgregwrite(bus, slot, func, reg, data, bytes); 319} 320 321static int 322acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin) 323{ 324 struct acpi_hpcib_softc *sc = device_get_softc(pcib); 325 326 return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt)); 327} 328 329static int 330acpi_pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, 331 int *irqs) 332{ 333 device_t bus; 334 335 bus = device_get_parent(pcib); 336 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount, 337 irqs)); 338} 339 340static int 341acpi_pcib_alloc_msix(device_t pcib, device_t dev, int *irq) 342{ 343 device_t bus; 344 345 bus = device_get_parent(pcib); 346 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq)); 347} 348 349static int 350acpi_pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, 351 uint32_t *data) 352{ 353 device_t bus; 354 355 bus = device_get_parent(pcib); 356 return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data)); 357} 358 359static u_long acpi_host_mem_start = 0x80000000; 360TUNABLE_ULONG("hw.acpi.host_mem_start", &acpi_host_mem_start); 361 362struct resource * 363acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid, 364 u_long start, u_long end, u_long count, u_int flags) 365{ 366 /* 367 * If no memory preference is given, use upper 32MB slot most 368 * bioses use for their memory window. Typically other bridges 369 * before us get in the way to assert their preferences on memory. 370 * Hardcoding like this sucks, so a more MD/MI way needs to be 371 * found to do it. This is typically only used on older laptops 372 * that don't have pci busses behind pci bridge, so assuming > 32MB 373 * is liekly OK. 374 */ 375 if (type == SYS_RES_MEMORY && start == 0UL && end == ~0UL) 376 start = acpi_host_mem_start; 377 if (type == SYS_RES_IOPORT && start == 0UL && end == ~0UL) 378 start = 0x1000; 379 return (bus_generic_alloc_resource(dev, child, type, rid, start, end, 380 count, flags)); 381} 382