/*- * 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 1.31.2.1.6.1 2009/04/15 03:14:26 kensmith Exp $ */ #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; int ap_flags; }; ACPI_SERIAL_DECL(pci_powerstate, "ACPI PCI power methods"); /* Be sure that ACPI and PCI power states are equivalent. */ CTASSERT(ACPI_STATE_D0 == PCI_POWERSTATE_D0); CTASSERT(ACPI_STATE_D1 == PCI_POWERSTATE_D1); CTASSERT(ACPI_STATE_D2 == PCI_POWERSTATE_D2); CTASSERT(ACPI_STATE_D3 == PCI_POWERSTATE_D3); static int acpi_pci_attach(device_t dev); static int acpi_pci_suspend(device_t dev); static int acpi_pci_resume(device_t dev); static int acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf, size_t buflen); static int acpi_pci_probe(device_t dev); static int acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result); static int acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value); static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context, void **status); static int acpi_pci_set_powerstate_method(device_t dev, device_t child, int state); static void acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child); 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, acpi_pci_suspend), DEVMETHOD(device_resume, acpi_pci_resume), /* Bus interface */ DEVMETHOD(bus_print_child, pci_print_child), 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_read_ivar, acpi_pci_read_ivar), DEVMETHOD(bus_write_ivar, acpi_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_child_location_str, acpi_pci_child_location_str_method), /* PCI interface */ DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method), 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 */ }; static devclass_t pci_devclass; DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0); MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1); MODULE_DEPEND(acpi_pci, pci, 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; dinfo = device_get_ivars(child); switch (which) { case ACPI_IVAR_HANDLE: *result = (uintptr_t)dinfo->ap_handle; return (0); case ACPI_IVAR_FLAGS: *result = (uintptr_t)dinfo->ap_flags; return (0); } return (pci_read_ivar(dev, child, which, result)); } static int acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value) { struct acpi_pci_devinfo *dinfo; dinfo = device_get_ivars(child); switch (which) { case ACPI_IVAR_HANDLE: dinfo->ap_handle = (ACPI_HANDLE)value; return (0); case ACPI_IVAR_FLAGS: dinfo->ap_flags = (int)value; return (0); } return (pci_write_ivar(dev, child, which, value)); } 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, " handle=", 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 old_state, error; error = 0; if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 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. */ ACPI_SERIAL_BEGIN(pci_powerstate); old_state = pci_get_powerstate(child); if (old_state < state) { error = pci_set_powerstate_method(dev, child, state); if (error) goto out; } h = acpi_get_handle(child); status = acpi_pwr_switch_consumer(h, state); if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) device_printf(dev, "Failed to set ACPI power state D%d on %s: %s\n", state, acpi_name(h), AcpiFormatException(status)); if (old_state > state) error = pci_set_powerstate_method(dev, child, state); out: ACPI_SERIAL_END(pci_powerstate); return (error); } static void acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child) { ACPI_STATUS status; device_t child; /* * Lookup and remove the unused device that acpi0 creates when it walks * the namespace creating devices. */ child = acpi_get_device(handle); if (child != NULL) { if (device_is_alive(child)) { /* * The TabletPC TC1000 has a second PCI-ISA bridge * that has a _HID for an acpi_sysresource device. * In that case, leave ACPI-CA's device data pointing * at the ACPI-enumerated device. */ device_printf(child, "Conflicts with PCI device %d:%d:%d\n", pci_get_bus(pci_child), pci_get_slot(pci_child), pci_get_function(pci_child)); return; } KASSERT(device_get_parent(child) == devclass_get_device(devclass_find("acpi"), 0), ("%s: child (%s)'s parent is not acpi0", __func__, acpi_name(handle))); device_delete_child(device_get_parent(child), child); } /* * Update ACPI-CA to use the PCI enumerated device_t for this handle. */ status = AcpiDetachData(handle, acpi_fake_objhandler); if (ACPI_FAILURE(status)) kprintf("WARNING: Unable to detach object data from %s - %s\n", acpi_name(handle), AcpiFormatException(status)); status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child); if (ACPI_FAILURE(status)) kprintf("WARNING: Unable to attach object data to %s - %s\n", acpi_name(handle), AcpiFormatException(status)); } 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 = ACPI_ADR_PCI_SLOT(address); func = ACPI_ADR_PCI_FUNC(address); 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; acpi_pci_update_device(handle, devlist[i]); break; } } kfree(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, domain; /* * Since there can be multiple independantly numbered PCI * busses on systems with multiple PCI domains, we can't use * the unit number to decide which bus we are probing. We ask * the parent pcib what our domain and bus numbers are. */ busno = pcib_get_bus(dev); domain = pcib_get_domain(dev); if (bootverbose) device_printf(dev, "domain=%d, physical bus=%d\n", domain, busno); ACPI_SERIAL_INIT(pci_powerstate); /* * 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, domain, 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)); } int acpi_pci_suspend(device_t dev) { int dstate, error, i, numdevs; device_t acpi_dev, child, *devlist; struct pci_devinfo *dinfo; /* * Save the PCI configuration space for each child and set the * device in the appropriate power state for this sleep state. */ acpi_dev = NULL; acpi_dev = devclass_get_device(devclass_find("acpi"), 0); device_get_children(dev, &devlist, &numdevs); for (i = 0; i < numdevs; i++) { child = devlist[i]; dinfo = (struct pci_devinfo *) device_get_ivars(child); pci_cfg_save(child, dinfo, 0); } /* Suspend devices before potentially powering them down. */ error = bus_generic_suspend(dev); if (error) { kfree(devlist, M_TEMP); return (error); } /* * Always set the device to D3. If ACPI suggests a different * power state, use it instead. If ACPI is not present, the * firmware is responsible for managing device power. Skip * children who aren't attached since they are powered down * separately. Only manage type 0 devices for now. */ for (i = 0; acpi_dev && i < numdevs; i++) { child = devlist[i]; dinfo = (struct pci_devinfo *) device_get_ivars(child); if (device_is_attached(child) && dinfo->cfg.hdrtype == 0) { dstate = PCI_POWERSTATE_D3; ACPI_PWR_FOR_SLEEP(acpi_dev, child, &dstate); pci_set_powerstate(child, dstate); } } kfree(devlist, M_TEMP); return (0); } int acpi_pci_resume(device_t dev) { int i, numdevs; device_t acpi_dev, child, *devlist; struct pci_devinfo *dinfo; /* * Set each child to D0 and restore its PCI configuration space. */ acpi_dev = NULL; acpi_dev = devclass_get_device(devclass_find("acpi"), 0); device_get_children(dev, &devlist, &numdevs); for (i = 0; i < numdevs; i++) { /* * Notify ACPI we're going to D0 but ignore the result. If * ACPI is not present, the firmware is responsible for * managing device power. Only manage type 0 devices for now. */ child = devlist[i]; dinfo = (struct pci_devinfo *) device_get_ivars(child); if (acpi_dev && device_is_attached(child) && dinfo->cfg.hdrtype == 0) { ACPI_PWR_FOR_SLEEP(acpi_dev, child, NULL); pci_set_powerstate(child, PCI_POWERSTATE_D0); } /* Now the device is powered up, restore its config space. */ pci_cfg_restore(child, dinfo); } kfree(devlist, M_TEMP); return (bus_generic_resume(dev)); }