45e556cc69
which doesn't support ACPI power states. Return AE_NOT_FOUND for these cases and don't print the warning message. Also, print the name of the handle instead of device when unable to switch states. The device is often not attached at this point and so its name is NULL, which doesn't help debugging.
281 lines
8.6 KiB
C
281 lines
8.6 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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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/* Hooks for the ACPI CA debugging infrastructure. */
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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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static int acpi_pci_child_location_str_method(device_t cbdev,
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device_t child, char *buf, size_t buflen);
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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 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, pci_suspend),
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DEVMETHOD(device_resume, pci_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, pci_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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DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method),
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DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method),
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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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DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method),
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DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method),
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DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_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_DEPEND(acpi_pci, acpi, 1, 1, 1);
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MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
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MODULE_VERSION(acpi_pci, 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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static int
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acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf,
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size_t buflen)
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{
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struct acpi_pci_devinfo *dinfo = device_get_ivars(child);
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pci_child_location_str_method(cbdev, child, buf, buflen);
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if (dinfo->ap_handle) {
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strlcat(buf, " path=", buflen);
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strlcat(buf, acpi_name(dinfo->ap_handle), buflen);
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}
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return (0);
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}
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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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ACPI_HANDLE h;
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ACPI_STATUS status;
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int acpi_state, old_state, error;
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switch (state) {
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case PCI_POWERSTATE_D0:
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acpi_state = ACPI_STATE_D0;
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break;
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case PCI_POWERSTATE_D1:
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acpi_state = ACPI_STATE_D1;
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break;
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case PCI_POWERSTATE_D2:
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acpi_state = ACPI_STATE_D2;
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break;
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case PCI_POWERSTATE_D3:
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acpi_state = ACPI_STATE_D3;
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break;
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default:
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return (EINVAL);
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}
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/*
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* We set the state using PCI Power Management outside of setting
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* the ACPI state. This means that when powering down a device, we
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* first shut it down using PCI, and then using ACPI, which lets ACPI
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* try to power down any Power Resources that are now no longer used.
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* When powering up a device, we let ACPI set the state first so that
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* it can enable any needed Power Resources before changing the PCI
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* power state.
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*/
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old_state = pci_get_powerstate(child);
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if (old_state < state) {
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error = pci_set_powerstate_method(dev, child, state);
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if (error)
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return (error);
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}
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h = acpi_get_handle(dev);
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status = acpi_pwr_switch_consumer(h, acpi_state);
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
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device_printf(dev,
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"Failed to set ACPI power state D%d on %s: %s\n",
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acpi_state, acpi_name(h), AcpiFormatException(status));
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if (old_state > state)
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return (pci_set_powerstate_method(dev, child, state));
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else
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return (0);
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}
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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_GetInteger(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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if (acpi_get_handle(dev) == NULL)
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return (ENXIO);
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device_set_desc(dev, "ACPI PCI bus");
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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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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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