forked from Minki/linux
c888770eb2
Use pci_is_bridge() to simplify code. No functional change. Requires:326c1cdae7PCI: Rename pci_is_bridge() to pci_has_subordinate() Requires:1c86438c94PCI: Add new pci_is_bridge() interface Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
/*
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* Derived from "arch/powerpc/platforms/pseries/pci_dlpar.c"
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*
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* Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
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* Copyright (C) 2005 International Business Machines
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*
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* Updates, 2005, John Rose <johnrose@austin.ibm.com>
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* Updates, 2005, Linas Vepstas <linas@austin.ibm.com>
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* Updates, 2013, Gavin Shan <shangw@linux.vnet.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/pci.h>
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#include <linux/export.h>
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#include <asm/pci-bridge.h>
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#include <asm/ppc-pci.h>
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#include <asm/firmware.h>
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#include <asm/eeh.h>
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/**
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* pcibios_release_device - release PCI device
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* @dev: PCI device
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*
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* The function is called before releasing the indicated PCI device.
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*/
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void pcibios_release_device(struct pci_dev *dev)
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{
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eeh_remove_device(dev);
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}
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/**
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* pcibios_remove_pci_devices - remove all devices under this bus
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* @bus: the indicated PCI bus
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*
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* Remove all of the PCI devices under this bus both from the
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* linux pci device tree, and from the powerpc EEH address cache.
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*/
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void pcibios_remove_pci_devices(struct pci_bus *bus)
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{
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struct pci_dev *dev, *tmp;
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struct pci_bus *child_bus;
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/* First go down child busses */
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list_for_each_entry(child_bus, &bus->children, node)
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pcibios_remove_pci_devices(child_bus);
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pr_debug("PCI: Removing devices on bus %04x:%02x\n",
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pci_domain_nr(bus), bus->number);
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list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
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pr_debug(" Removing %s...\n", pci_name(dev));
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pci_stop_and_remove_bus_device(dev);
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}
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}
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EXPORT_SYMBOL_GPL(pcibios_remove_pci_devices);
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/**
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* pcibios_add_pci_devices - adds new pci devices to bus
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* @bus: the indicated PCI bus
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*
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* This routine will find and fixup new pci devices under
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* the indicated bus. This routine presumes that there
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* might already be some devices under this bridge, so
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* it carefully tries to add only new devices. (And that
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* is how this routine differs from other, similar pcibios
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* routines.)
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*/
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void pcibios_add_pci_devices(struct pci_bus * bus)
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{
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int slotno, mode, pass, max;
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struct pci_dev *dev;
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struct device_node *dn = pci_bus_to_OF_node(bus);
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eeh_add_device_tree_early(dn);
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mode = PCI_PROBE_NORMAL;
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if (ppc_md.pci_probe_mode)
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mode = ppc_md.pci_probe_mode(bus);
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if (mode == PCI_PROBE_DEVTREE) {
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/* use ofdt-based probe */
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of_rescan_bus(dn, bus);
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} else if (mode == PCI_PROBE_NORMAL) {
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/*
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* Use legacy probe. In the partial hotplug case, we
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* probably have grandchildren devices unplugged. So
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* we don't check the return value from pci_scan_slot() in
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* order for fully rescan all the way down to pick them up.
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* They can have been removed during partial hotplug.
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*/
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slotno = PCI_SLOT(PCI_DN(dn->child)->devfn);
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pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
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pcibios_setup_bus_devices(bus);
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max = bus->busn_res.start;
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for (pass = 0; pass < 2; pass++) {
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list_for_each_entry(dev, &bus->devices, bus_list) {
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if (pci_is_bridge(dev))
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max = pci_scan_bridge(bus, dev,
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max, pass);
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}
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}
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}
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pcibios_finish_adding_to_bus(bus);
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}
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EXPORT_SYMBOL_GPL(pcibios_add_pci_devices);
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