34ff71eecd
resource allocation on x86 platforms: - Add a new helper API that Host-PCI bridge drivers can use to restrict resource allocation requests to a set of address ranges for different resource types. - For the ACPI Host-PCI bridge driver, use Producer address range resources in _CRS to enumerate valid address ranges for a given Host-PCI bridge. This can be disabled by including "hostres" in the debug.acpi.disabled tunable. - For the MPTable Host-PCI bridge driver, use entries in the extended MPTable to determine the valid address ranges for a given Host-PCI bridge. This required adding code to parse extended table entries. Similar to the new PCI-PCI bridge driver, these changes are only enabled if the NEW_PCIB kernel option is enabled (which is enabled by default on amd64 and i386). Approved by: re (kib)
537 lines
16 KiB
C
537 lines
16 KiB
C
/*-
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_acpi.h"
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/limits.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <dev/acpica/acpivar.h>
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#include <machine/pci_cfgreg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcib_private.h>
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#include "pcib_if.h"
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#include <dev/acpica/acpi_pcibvar.h>
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/* Hooks for the ACPI CA debugging infrastructure. */
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#define _COMPONENT ACPI_BUS
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ACPI_MODULE_NAME("PCI_ACPI")
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struct acpi_hpcib_softc {
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device_t ap_dev;
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ACPI_HANDLE ap_handle;
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int ap_flags;
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int ap_segment; /* analagous to Alpha 'hose' */
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int ap_bus; /* bios-assigned bus number */
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ACPI_BUFFER ap_prt; /* interrupt routing table */
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#ifdef NEW_PCIB
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struct pcib_host_resources ap_host_res;
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#endif
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};
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static int acpi_pcib_acpi_probe(device_t bus);
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static int acpi_pcib_acpi_attach(device_t bus);
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static int acpi_pcib_read_ivar(device_t dev, device_t child,
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int which, uintptr_t *result);
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static int acpi_pcib_write_ivar(device_t dev, device_t child,
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int which, uintptr_t value);
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static uint32_t acpi_pcib_read_config(device_t dev, u_int bus,
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u_int slot, u_int func, u_int reg, int bytes);
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static void acpi_pcib_write_config(device_t dev, u_int bus,
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u_int slot, u_int func, u_int reg, uint32_t data,
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int bytes);
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static int acpi_pcib_acpi_route_interrupt(device_t pcib,
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device_t dev, int pin);
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static int acpi_pcib_alloc_msi(device_t pcib, device_t dev,
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int count, int maxcount, int *irqs);
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static int acpi_pcib_map_msi(device_t pcib, device_t dev,
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int irq, uint64_t *addr, uint32_t *data);
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static int acpi_pcib_alloc_msix(device_t pcib, device_t dev,
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int *irq);
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static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev,
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device_t child, int type, int *rid,
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u_long start, u_long end, u_long count,
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u_int flags);
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#ifdef NEW_PCIB
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static int acpi_pcib_acpi_adjust_resource(device_t dev,
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device_t child, int type, struct resource *r,
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u_long start, u_long end);
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#endif
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static device_method_t acpi_pcib_acpi_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, acpi_pcib_acpi_probe),
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DEVMETHOD(device_attach, acpi_pcib_acpi_attach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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/* Bus interface */
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DEVMETHOD(bus_print_child, bus_generic_print_child),
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DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar),
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DEVMETHOD(bus_write_ivar, acpi_pcib_write_ivar),
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DEVMETHOD(bus_alloc_resource, acpi_pcib_acpi_alloc_resource),
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#ifdef NEW_PCIB
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DEVMETHOD(bus_adjust_resource, acpi_pcib_acpi_adjust_resource),
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#else
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DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
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#endif
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DEVMETHOD(bus_release_resource, bus_generic_release_resource),
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DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
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DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
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DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
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DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
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/* pcib interface */
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DEVMETHOD(pcib_maxslots, pcib_maxslots),
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DEVMETHOD(pcib_read_config, acpi_pcib_read_config),
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DEVMETHOD(pcib_write_config, acpi_pcib_write_config),
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DEVMETHOD(pcib_route_interrupt, acpi_pcib_acpi_route_interrupt),
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DEVMETHOD(pcib_alloc_msi, acpi_pcib_alloc_msi),
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DEVMETHOD(pcib_release_msi, pcib_release_msi),
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DEVMETHOD(pcib_alloc_msix, acpi_pcib_alloc_msix),
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DEVMETHOD(pcib_release_msix, pcib_release_msix),
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DEVMETHOD(pcib_map_msi, acpi_pcib_map_msi),
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DEVMETHOD(pcib_power_for_sleep, acpi_pcib_power_for_sleep),
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{0, 0}
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};
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static devclass_t pcib_devclass;
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DEFINE_CLASS_0(pcib, acpi_pcib_acpi_driver, acpi_pcib_acpi_methods,
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sizeof(struct acpi_hpcib_softc));
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DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0);
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MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
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static int
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acpi_pcib_acpi_probe(device_t dev)
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{
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ACPI_DEVICE_INFO *devinfo;
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ACPI_HANDLE h;
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int root;
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if (acpi_disabled("pcib") || (h = acpi_get_handle(dev)) == NULL ||
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ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
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return (ENXIO);
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root = (devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0;
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AcpiOsFree(devinfo);
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if (!root || pci_cfgregopen() == 0)
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return (ENXIO);
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device_set_desc(dev, "ACPI Host-PCI bridge");
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return (0);
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}
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#ifdef NEW_PCIB
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static ACPI_STATUS
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acpi_pcib_producer_handler(ACPI_RESOURCE *res, void *context)
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{
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struct acpi_hpcib_softc *sc;
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UINT64 length, min, max;
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u_int flags;
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int error, type;
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sc = context;
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switch (res->Type) {
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case ACPI_RESOURCE_TYPE_START_DEPENDENT:
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case ACPI_RESOURCE_TYPE_END_DEPENDENT:
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panic("host bridge has depenedent resources");
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case ACPI_RESOURCE_TYPE_ADDRESS16:
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case ACPI_RESOURCE_TYPE_ADDRESS32:
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case ACPI_RESOURCE_TYPE_ADDRESS64:
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case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
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if (res->Data.Address.ProducerConsumer != ACPI_PRODUCER)
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break;
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switch (res->Type) {
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case ACPI_RESOURCE_TYPE_ADDRESS16:
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min = res->Data.Address16.Minimum;
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max = res->Data.Address16.Maximum;
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length = res->Data.Address16.AddressLength;
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break;
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case ACPI_RESOURCE_TYPE_ADDRESS32:
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min = res->Data.Address32.Minimum;
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max = res->Data.Address32.Maximum;
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length = res->Data.Address32.AddressLength;
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break;
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case ACPI_RESOURCE_TYPE_ADDRESS64:
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min = res->Data.Address64.Minimum;
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max = res->Data.Address64.Maximum;
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length = res->Data.Address64.AddressLength;
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break;
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default:
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KASSERT(res->Type ==
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ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64,
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("should never happen"));
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min = res->Data.ExtAddress64.Minimum;
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max = res->Data.ExtAddress64.Maximum;
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length = res->Data.ExtAddress64.AddressLength;
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break;
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}
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if (length == 0 ||
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res->Data.Address.MinAddressFixed != ACPI_ADDRESS_FIXED ||
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res->Data.Address.MaxAddressFixed != ACPI_ADDRESS_FIXED)
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break;
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flags = 0;
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switch (res->Data.Address.ResourceType) {
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case ACPI_MEMORY_RANGE:
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type = SYS_RES_MEMORY;
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if (res->Type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) {
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if (res->Data.Address.Info.Mem.Caching ==
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ACPI_PREFETCHABLE_MEMORY)
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flags |= RF_PREFETCHABLE;
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} else {
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/*
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* XXX: Parse prefetch flag out of
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* TypeSpecific.
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*/
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}
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break;
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case ACPI_IO_RANGE:
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type = SYS_RES_IOPORT;
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break;
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#ifdef PCI_RES_BUS
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case ACPI_BUS_NUMBER_RANGE:
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type = PCI_RES_BUS;
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break;
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#endif
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default:
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return (AE_OK);
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}
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/* XXX: Not sure this is correct? */
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if (res->Data.Address.Decode != ACPI_POS_DECODE) {
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device_printf(sc->ap_dev,
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"Ignoring %d range (%#jx-%#jx) due to negative decode\n",
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type, (uintmax_t)min, (uintmax_t)max);
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break;
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}
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if (min + length - 1 != max)
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device_printf(sc->ap_dev,
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"Length mismatch for %d range: %jx vs %jx\n", type,
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(uintmax_t)max - min + 1, (uintmax_t)length);
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#ifdef __i386__
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if (min > ULONG_MAX) {
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device_printf(sc->ap_dev,
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"Ignoring %d range above 4GB (%#jx-%#jx)\n",
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type, (uintmax_t)min, (uintmax_t)max);
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break;
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}
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if (max > ULONG_MAX) {
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device_printf(sc->ap_dev,
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"Truncating end of %d range above 4GB (%#jx-%#jx)\n",
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type, (uintmax_t)min, (uintmax_t)max);
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max = ULONG_MAX;
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}
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#endif
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error = pcib_host_res_decodes(&sc->ap_host_res, type, min, max,
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flags);
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if (error)
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panic("Failed to manage %d range (%#jx-%#jx): %d",
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type, (uintmax_t)min, (uintmax_t)max, error);
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break;
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default:
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break;
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}
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return (AE_OK);
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}
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#endif
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static int
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acpi_pcib_acpi_attach(device_t dev)
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{
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struct acpi_hpcib_softc *sc;
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ACPI_STATUS status;
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static int bus0_seen = 0;
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u_int addr, slot, func, busok;
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uint8_t busno;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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sc = device_get_softc(dev);
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sc->ap_dev = dev;
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sc->ap_handle = acpi_get_handle(dev);
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/*
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* Get our segment number by evaluating _SEG
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* It's OK for this to not exist.
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*/
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status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment);
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if (ACPI_FAILURE(status)) {
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if (status != AE_NOT_FOUND) {
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device_printf(dev, "could not evaluate _SEG - %s\n",
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AcpiFormatException(status));
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return_VALUE (ENXIO);
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}
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/* If it's not found, assume 0. */
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sc->ap_segment = 0;
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}
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#ifdef NEW_PCIB
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/*
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* Determine which address ranges this bridge decodes and setup
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* resource managers for those ranges.
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*/
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if (pcib_host_res_init(sc->ap_dev, &sc->ap_host_res) != 0)
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panic("failed to init hostb resources");
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if (!acpi_disabled("hostres")) {
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status = AcpiWalkResources(sc->ap_handle, "_CRS",
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acpi_pcib_producer_handler, sc);
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
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device_printf(sc->ap_dev, "failed to parse resources: %s\n",
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AcpiFormatException(status));
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}
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#endif
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/*
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* Get our base bus number by evaluating _BBN.
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* If this doesn't work, we assume we're bus number 0.
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*
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* XXX note that it may also not exist in the case where we are
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* meant to use a private configuration space mechanism for this bus,
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* so we should dig out our resources and check to see if we have
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* anything like that. How do we do this?
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* XXX If we have the requisite information, and if we don't think the
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* default PCI configuration space handlers can deal with this bus,
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* we should attach our own handler.
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* XXX invoke _REG on this for the PCI config space address space?
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* XXX It seems many BIOS's with multiple Host-PCI bridges do not set
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* _BBN correctly. They set _BBN to zero for all bridges. Thus,
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* if _BBN is zero and PCI bus 0 already exists, we try to read our
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* bus number from the configuration registers at address _ADR.
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* We only do this for domain/segment 0 in the hopes that this is
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* only needed for old single-domain machines.
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*/
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status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus);
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if (ACPI_FAILURE(status)) {
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if (status != AE_NOT_FOUND) {
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device_printf(dev, "could not evaluate _BBN - %s\n",
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AcpiFormatException(status));
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return_VALUE (ENXIO);
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} else {
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/* If it's not found, assume 0. */
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sc->ap_bus = 0;
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}
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}
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/*
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* If this is segment 0, the bus is zero, and PCI bus 0 already
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* exists, read the bus number via PCI config space.
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*/
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busok = 1;
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if (sc->ap_segment == 0 && sc->ap_bus == 0 && bus0_seen) {
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busok = 0;
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status = acpi_GetInteger(sc->ap_handle, "_ADR", &addr);
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if (ACPI_FAILURE(status)) {
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if (status != AE_NOT_FOUND) {
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device_printf(dev, "could not evaluate _ADR - %s\n",
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AcpiFormatException(status));
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return_VALUE (ENXIO);
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} else
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device_printf(dev, "couldn't find _ADR\n");
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} else {
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/* XXX: We assume bus 0. */
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slot = ACPI_ADR_PCI_SLOT(addr);
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func = ACPI_ADR_PCI_FUNC(addr);
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if (bootverbose)
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device_printf(dev, "reading config registers from 0:%d:%d\n",
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slot, func);
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if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0)
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device_printf(dev, "couldn't read bus number from cfg space\n");
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else {
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sc->ap_bus = busno;
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busok = 1;
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}
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}
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}
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/*
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* If nothing else worked, hope that ACPI at least lays out the
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* host-PCI bridges in order and that as a result our unit number
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* is actually our bus number. There are several reasons this
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* might not be true.
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*/
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if (busok == 0) {
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sc->ap_bus = device_get_unit(dev);
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device_printf(dev, "trying bus number %d\n", sc->ap_bus);
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}
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/* If this is bus 0 on segment 0, note that it has been seen already. */
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if (sc->ap_segment == 0 && sc->ap_bus == 0)
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bus0_seen = 1;
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return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus));
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}
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/*
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* Support for standard PCI bridge ivars.
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*/
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static int
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acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
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{
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struct acpi_hpcib_softc *sc = device_get_softc(dev);
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switch (which) {
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case PCIB_IVAR_DOMAIN:
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*result = sc->ap_segment;
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return (0);
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case PCIB_IVAR_BUS:
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*result = sc->ap_bus;
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return (0);
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case ACPI_IVAR_HANDLE:
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*result = (uintptr_t)sc->ap_handle;
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return (0);
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case ACPI_IVAR_FLAGS:
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*result = (uintptr_t)sc->ap_flags;
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return (0);
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}
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return (ENOENT);
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}
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static int
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acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
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{
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struct acpi_hpcib_softc *sc = device_get_softc(dev);
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switch (which) {
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case PCIB_IVAR_DOMAIN:
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return (EINVAL);
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case PCIB_IVAR_BUS:
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sc->ap_bus = value;
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return (0);
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case ACPI_IVAR_HANDLE:
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sc->ap_handle = (ACPI_HANDLE)value;
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return (0);
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case ACPI_IVAR_FLAGS:
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sc->ap_flags = (int)value;
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return (0);
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}
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return (ENOENT);
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}
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static uint32_t
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acpi_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func,
|
|
u_int reg, int bytes)
|
|
{
|
|
return (pci_cfgregread(bus, slot, func, reg, bytes));
|
|
}
|
|
|
|
static void
|
|
acpi_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func,
|
|
u_int reg, uint32_t data, int bytes)
|
|
{
|
|
pci_cfgregwrite(bus, slot, func, reg, data, bytes);
|
|
}
|
|
|
|
static int
|
|
acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin)
|
|
{
|
|
struct acpi_hpcib_softc *sc = device_get_softc(pcib);
|
|
|
|
return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
|
|
}
|
|
|
|
static int
|
|
acpi_pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
|
|
int *irqs)
|
|
{
|
|
device_t bus;
|
|
|
|
bus = device_get_parent(pcib);
|
|
return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
|
|
irqs));
|
|
}
|
|
|
|
static int
|
|
acpi_pcib_alloc_msix(device_t pcib, device_t dev, int *irq)
|
|
{
|
|
device_t bus;
|
|
|
|
bus = device_get_parent(pcib);
|
|
return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
|
|
}
|
|
|
|
static int
|
|
acpi_pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
|
|
uint32_t *data)
|
|
{
|
|
device_t bus;
|
|
|
|
bus = device_get_parent(pcib);
|
|
return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data));
|
|
}
|
|
|
|
struct resource *
|
|
acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid,
|
|
u_long start, u_long end, u_long count, u_int flags)
|
|
{
|
|
#ifdef NEW_PCIB
|
|
struct acpi_hpcib_softc *sc;
|
|
#endif
|
|
|
|
#if defined(__i386__) || defined(__amd64__)
|
|
start = hostb_alloc_start(type, start, end, count);
|
|
#endif
|
|
|
|
#ifdef NEW_PCIB
|
|
sc = device_get_softc(dev);
|
|
return (pcib_host_res_alloc(&sc->ap_host_res, child, type, rid, start, end,
|
|
count, flags));
|
|
#else
|
|
return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
|
|
count, flags));
|
|
#endif
|
|
}
|
|
|
|
#ifdef NEW_PCIB
|
|
int
|
|
acpi_pcib_acpi_adjust_resource(device_t dev, device_t child, int type,
|
|
struct resource *r, u_long start, u_long end)
|
|
{
|
|
struct acpi_hpcib_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
return (pcib_host_res_adjust(&sc->ap_host_res, child, type, r, start,
|
|
end));
|
|
}
|
|
#endif
|