Associate device_t objects with ACPI handles via PCI_CHILD_ADDED().
Previously, the ACPI PCI bus driver did a single pass over the devices in the namespace that were a child of a given PCI bus to associate the PCI bus-enumerated device_t devices with the corresponding ACPI handles. However, this meant that handles were only established at runtime for devices found during the initial PCI bus scan. PCI_IOV adds devices that show up after the initial PCI bus scan, and coming changes to add a bus rescan can also add devices after the initial scan. This change adds a pci_child_added() callback to the ACPI PCI bus that walks the namespace to find the ACPI handle for each device that is added. Using a callback means that the handle is correctly set for any device no matter how it is added (initial scan, IOV, or a bus rescan).
This commit is contained in:
parent
019a4a20e7
commit
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=297679
@ -42,6 +42,7 @@ __FBSDID("$FreeBSD$");
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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 <dev/acpica/acpi_pcivar.h>
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#include <sys/pciio.h>
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#include <dev/pci/pcireg.h>
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@ -104,6 +105,7 @@ static device_method_t acpi_pci_methods[] = {
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DEVMETHOD(bus_get_domain, acpi_get_domain),
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/* PCI interface */
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DEVMETHOD(pci_child_added, acpi_pci_child_added),
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DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method),
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#ifdef PCI_IOV
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DEVMETHOD(pci_create_iov_child, acpi_pci_create_iov_child),
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@ -271,31 +273,35 @@ 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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device_t child;
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int func, slot;
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UINT32 address;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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child = context;
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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 = ACPI_ADR_PCI_SLOT(address);
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func = ACPI_ADR_PCI_FUNC(address);
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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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dinfo = device_get_ivars(child);
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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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acpi_pci_update_device(handle, devlist[i]);
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break;
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acpi_pci_update_device(handle, child);
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return_ACPI_STATUS (AE_CTRL_TERMINATE);
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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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void
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acpi_pci_child_added(device_t dev, device_t child)
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{
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AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
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acpi_pci_save_handle, NULL, child, NULL);
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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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@ -325,18 +331,18 @@ acpi_pci_attach(device_t dev)
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busno = pcib_get_bus(dev);
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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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* PCI devices are added via the bus scan in the normal PCI
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* bus driver. As each device is added, the
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* acpi_pci_child_added() callback walks the ACPI namespace
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* under the bridge driver to save ACPI handles to all the
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* devices that appear in the ACPI namespace as immediate
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* 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, domain, 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, NULL, dev, NULL);
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return (bus_generic_attach(dev));
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}
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@ -371,17 +377,9 @@ static device_t
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acpi_pci_create_iov_child(device_t bus, device_t pf, uint16_t rid, uint16_t vid,
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uint16_t did)
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{
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struct acpi_pci_devinfo *dinfo;
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device_t vf;
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vf = pci_add_iov_child(bus, pf, sizeof(struct acpi_pci_devinfo), rid,
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vid, did);
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if (vf == NULL)
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return (NULL);
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dinfo = device_get_ivars(vf);
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dinfo->ap_handle = NULL;
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return (vf);
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return (pci_add_iov_child(bus, pf, sizeof(struct acpi_pci_devinfo), rid,
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vid, did));
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}
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#endif
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38
sys/dev/acpica/acpi_pcivar.h
Normal file
38
sys/dev/acpica/acpi_pcivar.h
Normal file
@ -0,0 +1,38 @@
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/*-
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* Copyright (c) 2016 John Baldwin <jhb@FreeBSD.org>
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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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* $FreeBSD$
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*/
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#ifndef _ACPI_PCIVAR_H_
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#define _ACPI_PCIVAR_H_
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#ifdef _KERNEL
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void acpi_pci_child_added(device_t dev, device_t child);
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#endif
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#endif /* !_ACPI_PCIVAR_H_ */
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@ -38,6 +38,7 @@ __FBSDID("$FreeBSD$");
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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 <dev/acpica/acpi_pcivar.h>
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#include <sys/pciio.h>
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#include <dev/pci/pcireg.h>
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@ -65,6 +66,14 @@ xen_acpi_pci_probe(device_t dev)
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return (BUS_PROBE_SPECIFIC);
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}
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static void
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xen_acpi_pci_child_added(device_t dev, device_t child)
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{
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acpi_pci_child_added(dev, child);
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xen_pci_child_added_method(dev, child);
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}
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static device_method_t xen_acpi_pci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, xen_acpi_pci_probe),
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@ -72,7 +81,7 @@ static device_method_t xen_acpi_pci_methods[] = {
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/* PCI interface overwrites */
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DEVMETHOD(pci_enable_msi, xen_pci_enable_msi_method),
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DEVMETHOD(pci_disable_msi, xen_pci_disable_msi_method),
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DEVMETHOD(pci_child_added, xen_pci_child_added_method),
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DEVMETHOD(pci_child_added, xen_acpi_pci_child_added),
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DEVMETHOD_END
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};
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