/* * Copyright (c) 1997, Stefan Esser * Copyright (c) 2000, Michael Smith * Copyright (c) 2000, BSDi * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice unmodified, this list of conditions, and the following * disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $FreeBSD: src/sys/dev/acpica/acpi_pci.c,v 1.16 2004/05/29 04:32:50 njl Exp $ * $DragonFly: src/sys/dev/acpica5/acpi_pci.c,v 1.3 2004/07/05 00:07:35 dillon Exp $ */ #include "opt_bus.h" #include #include #include #include #include #include #include "acpi.h" #include "acpivar.h" #include #include #include #include #include "pcib_if.h" #include "pci_if.h" /* Hooks for the ACPI CA debugging infrastructure. */ #define _COMPONENT ACPI_BUS ACPI_MODULE_NAME("PCI") struct acpi_pci_devinfo { struct pci_devinfo ap_dinfo; ACPI_HANDLE ap_handle; }; static int acpi_pci_probe(device_t dev); static int acpi_pci_attach(device_t dev); static int acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result); static int acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf, size_t buflen); static int acpi_pci_set_powerstate_method(device_t dev, device_t child, int state); static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context, void **status); static device_method_t acpi_pci_methods[] = { /* Device interface */ DEVMETHOD(device_probe, acpi_pci_probe), DEVMETHOD(device_attach, acpi_pci_attach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), /* Bus interface */ DEVMETHOD(bus_print_child, pci_print_child), DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch), DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar), DEVMETHOD(bus_write_ivar, pci_write_ivar), DEVMETHOD(bus_driver_added, bus_generic_driver_added), DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), DEVMETHOD(bus_get_resource_list,pci_get_resource_list), DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), DEVMETHOD(bus_delete_resource, pci_delete_resource), DEVMETHOD(bus_alloc_resource, pci_alloc_resource), DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method), DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method), /* PCI interface */ DEVMETHOD(pci_read_config, pci_read_config_method), DEVMETHOD(pci_write_config, pci_write_config_method), DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method), DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method), DEVMETHOD(pci_enable_io, pci_enable_io_method), DEVMETHOD(pci_disable_io, pci_disable_io_method), DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method), DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method), DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method), { 0, 0 } }; static driver_t acpi_pci_driver = { "pci", acpi_pci_methods, 0, /* no softc */ }; DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0); MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1); MODULE_VERSION(acpi_pci, 1); static int acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) { struct acpi_pci_devinfo *dinfo; switch (which) { case ACPI_IVAR_HANDLE: dinfo = device_get_ivars(child); *result = (uintptr_t)dinfo->ap_handle; return (0); } return (pci_read_ivar(dev, child, which, result)); } static int acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf, size_t buflen) { struct acpi_pci_devinfo *dinfo = device_get_ivars(child); pci_child_location_str_method(cbdev, child, buf, buflen); if (dinfo->ap_handle) { strlcat(buf, " path=", buflen); strlcat(buf, acpi_name(dinfo->ap_handle), buflen); } return (0); } /* * PCI power manangement */ static int acpi_pci_set_powerstate_method(device_t dev, device_t child, int state) { ACPI_HANDLE h; ACPI_STATUS status; int acpi_state, old_state, error; switch (state) { case PCI_POWERSTATE_D0: acpi_state = ACPI_STATE_D0; break; case PCI_POWERSTATE_D1: acpi_state = ACPI_STATE_D1; break; case PCI_POWERSTATE_D2: acpi_state = ACPI_STATE_D2; break; case PCI_POWERSTATE_D3: acpi_state = ACPI_STATE_D3; break; default: return (EINVAL); } /* * We set the state using PCI Power Management outside of setting * the ACPI state. This means that when powering down a device, we * first shut it down using PCI, and then using ACPI, which lets ACPI * try to power down any Power Resources that are now no longer used. * When powering up a device, we let ACPI set the state first so that * it can enable any needed Power Resources before changing the PCI * power state. */ old_state = pci_get_powerstate(child); if (old_state < state) { error = pci_set_powerstate_method(dev, child, state); if (error) return (error); } h = acpi_get_handle(child); if (h != NULL) { status = acpi_pwr_switch_consumer(h, acpi_state); if (ACPI_FAILURE(status)) device_printf(dev, "Failed to set ACPI power state D%d on %s: %s\n", acpi_state, device_get_nameunit(child), AcpiFormatException(status)); } if (old_state > state) return (pci_set_powerstate_method(dev, child, state)); else return (0); } static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context, void **status) { struct acpi_pci_devinfo *dinfo; device_t *devlist; int devcount, i, func, slot; UINT32 address; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address))) return_ACPI_STATUS (AE_OK); slot = address >> 16; func = address & 0xffff; if (device_get_children((device_t)context, &devlist, &devcount) != 0) return_ACPI_STATUS (AE_OK); for (i = 0; i < devcount; i++) { dinfo = device_get_ivars(devlist[i]); if (dinfo->ap_dinfo.cfg.func == func && dinfo->ap_dinfo.cfg.slot == slot) { dinfo->ap_handle = handle; free(devlist, M_TEMP); return_ACPI_STATUS (AE_OK); } } free(devlist, M_TEMP); return_ACPI_STATUS (AE_OK); } static int acpi_pci_probe(device_t dev) { if (pcib_get_bus(dev) < 0) return (ENXIO); if (acpi_get_handle(dev) == NULL) return (ENXIO); device_set_desc(dev, "ACPI PCI bus"); return (0); } static int acpi_pci_attach(device_t dev) { int busno; /* * Since there can be multiple independantly numbered PCI * busses on some large alpha systems, we can't use the unit * number to decide what bus we are probing. We ask the parent * pcib what our bus number is. */ busno = pcib_get_bus(dev); if (bootverbose) device_printf(dev, "physical bus=%d\n", busno); /* * First, PCI devices are added as in the normal PCI bus driver. * Afterwards, the ACPI namespace under the bridge driver is * walked to save ACPI handles to all the devices that appear in * the ACPI namespace as immediate descendants of the bridge. * * XXX: Sometimes PCI devices show up in the ACPI namespace that * pci_add_children() doesn't find. We currently just ignore * these devices. */ pci_add_children(dev, busno, sizeof(struct acpi_pci_devinfo)); AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1, acpi_pci_save_handle, dev, NULL); return (bus_generic_attach(dev)); }