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1d62131385
when the first PCI bus attaches. - Create /dev/pci during MOD_LOAD as well. - Destroy /dev/pci during MOD_UNLOAD (not that you can kldunload pci, but might as well get the code right)
234 lines
6.9 KiB
C
234 lines
6.9 KiB
C
/*
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* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
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* Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
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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 unmodified, this list of conditions, and the following
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* 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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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#include "opt_bus.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include "acpi.h"
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#include <dev/acpica/acpivar.h>
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#include <sys/pciio.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pci_private.h>
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#include "pcib_if.h"
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#include "pci_if.h"
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/*
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* Hooks for the ACPI CA debugging infrastructure
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*/
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#define _COMPONENT ACPI_BUS
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ACPI_MODULE_NAME("PCI")
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struct acpi_pci_devinfo {
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struct pci_devinfo ap_dinfo;
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ACPI_HANDLE ap_handle;
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};
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static int acpi_pci_probe(device_t dev);
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static int acpi_pci_attach(device_t dev);
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static int acpi_pci_read_ivar(device_t dev, device_t child, int which,
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uintptr_t *result);
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#if 0
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static int acpi_pci_set_powerstate_method(device_t dev, device_t child,
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int state);
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static int acpi_pci_get_powerstate_method(device_t dev, device_t child);
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#endif
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static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
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void *context, void **status);
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static device_method_t acpi_pci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, acpi_pci_probe),
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DEVMETHOD(device_attach, acpi_pci_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, pci_print_child),
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DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch),
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DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar),
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DEVMETHOD(bus_write_ivar, pci_write_ivar),
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DEVMETHOD(bus_driver_added, bus_generic_driver_added),
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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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DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
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DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
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DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
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DEVMETHOD(bus_delete_resource, pci_delete_resource),
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DEVMETHOD(bus_alloc_resource, pci_alloc_resource),
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DEVMETHOD(bus_release_resource, bus_generic_rl_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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/* PCI interface */
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DEVMETHOD(pci_read_config, pci_read_config_method),
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DEVMETHOD(pci_write_config, pci_write_config_method),
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DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method),
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DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method),
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DEVMETHOD(pci_enable_io, pci_enable_io_method),
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DEVMETHOD(pci_disable_io, pci_disable_io_method),
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/* XXX: We should override these two. */
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DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method),
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DEVMETHOD(pci_set_powerstate, pci_set_powerstate_method),
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{ 0, 0 }
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};
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static driver_t acpi_pci_driver = {
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"pci",
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acpi_pci_methods,
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0, /* no softc */
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};
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DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
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MODULE_VERSION(acpi_pci, 1);
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MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
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static int
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acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
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{
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struct acpi_pci_devinfo *dinfo;
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switch (which) {
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case ACPI_IVAR_HANDLE:
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dinfo = device_get_ivars(child);
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*result = (uintptr_t)dinfo->ap_handle;
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return(0);
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}
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return(pci_read_ivar(dev, child, which, result));
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}
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#if 0
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/*
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* PCI power manangement
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*/
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static int
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acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
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{
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/* XXX: TODO */
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return (ENXIO);
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}
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static int
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acpi_pci_get_powerstate_method(device_t dev, device_t child)
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{
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/* XXX: TODO */
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return (ENXIO);
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}
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#endif
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static ACPI_STATUS
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acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
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void **status)
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{
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struct acpi_pci_devinfo *dinfo;
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device_t *devlist;
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int devcount, i, func, slot;
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UINT32 address;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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if (ACPI_FAILURE(acpi_EvaluateInteger(handle, "_ADR", &address)))
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return_ACPI_STATUS(AE_OK);
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slot = address >> 16;
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func = address & 0xffff;
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if (device_get_children((device_t)context, &devlist, &devcount) != 0)
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return_ACPI_STATUS(AE_OK);
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for (i = 0; i < devcount; i++) {
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dinfo = device_get_ivars(devlist[i]);
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if (dinfo->ap_dinfo.cfg.func == func &&
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dinfo->ap_dinfo.cfg.slot == slot) {
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dinfo->ap_handle = handle;
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free(devlist, M_TEMP);
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return_ACPI_STATUS(AE_OK);
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}
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}
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free(devlist, M_TEMP);
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return_ACPI_STATUS(AE_OK);
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}
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static int
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acpi_pci_probe(device_t dev)
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{
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if (pcib_get_bus(dev) < 0)
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return (ENXIO);
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device_set_desc(dev, "ACPI PCI bus");
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if (acpi_get_handle(dev) == NULL)
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return (ENXIO);
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return (0);
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}
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static int
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acpi_pci_attach(device_t dev)
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{
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int busno;
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/*
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* Since there can be multiple independantly numbered PCI
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* busses on some large alpha systems, we can't use the unit
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* number to decide what bus we are probing. We ask the parent
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* pcib what our bus number is.
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*/
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busno = pcib_get_bus(dev);
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if (bootverbose)
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device_printf(dev, "physical bus=%d\n", busno);
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/*
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* First, PCI devices are added as in the normal PCI bus driver.
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* Afterwards, the ACPI namespace under the bridge driver is
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* walked to save ACPI handles to all the devices that appear in
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* the ACPI namespace as immediate descendants of the bridge.
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*
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* XXX: Sometimes PCI devices show up in the ACPI namespace that
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* pci_add_children() doesn't find. We currently just ignore
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* these devices.
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*/
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pci_add_children(dev, busno, sizeof(struct acpi_pci_devinfo));
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(void) AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
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acpi_pci_save_handle, dev, NULL);
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return (bus_generic_attach(dev));
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}
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