mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 12:36:52 +07:00
317f06de78
The patch moves the common part of EEH core into arch/powerpc/kernel
directory so that we needn't PPC_PSERIES while compiling POWERNV
platform:
* Move the EEH common part into arch/powerpc/kernel
* Move the functions for PCI hotplug from pSeries platform to
arch/powerpc/kernel/pci-hotplug.c
* Move CONFIG_EEH from arch/powerpc/platforms/pseries/Kconfig to
arch/powerpc/platforms/Kconfig
* Adjust makefile accordingly
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
112 lines
3.5 KiB
C
112 lines
3.5 KiB
C
/*
|
|
* Derived from "arch/powerpc/platforms/pseries/pci_dlpar.c"
|
|
*
|
|
* Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
|
|
* Copyright (C) 2005 International Business Machines
|
|
*
|
|
* Updates, 2005, John Rose <johnrose@austin.ibm.com>
|
|
* Updates, 2005, Linas Vepstas <linas@austin.ibm.com>
|
|
* Updates, 2013, Gavin Shan <shangw@linux.vnet.ibm.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/export.h>
|
|
#include <asm/pci-bridge.h>
|
|
#include <asm/ppc-pci.h>
|
|
#include <asm/firmware.h>
|
|
#include <asm/eeh.h>
|
|
|
|
/**
|
|
* __pcibios_remove_pci_devices - remove all devices under this bus
|
|
* @bus: the indicated PCI bus
|
|
* @purge_pe: destroy the PE on removal of PCI devices
|
|
*
|
|
* Remove all of the PCI devices under this bus both from the
|
|
* linux pci device tree, and from the powerpc EEH address cache.
|
|
* By default, the corresponding PE will be destroied during the
|
|
* normal PCI hotplug path. For PCI hotplug during EEH recovery,
|
|
* the corresponding PE won't be destroied and deallocated.
|
|
*/
|
|
void __pcibios_remove_pci_devices(struct pci_bus *bus, int purge_pe)
|
|
{
|
|
struct pci_dev *dev, *tmp;
|
|
struct pci_bus *child_bus;
|
|
|
|
/* First go down child busses */
|
|
list_for_each_entry(child_bus, &bus->children, node)
|
|
__pcibios_remove_pci_devices(child_bus, purge_pe);
|
|
|
|
pr_debug("PCI: Removing devices on bus %04x:%02x\n",
|
|
pci_domain_nr(bus), bus->number);
|
|
list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
|
|
pr_debug(" * Removing %s...\n", pci_name(dev));
|
|
eeh_remove_bus_device(dev, purge_pe);
|
|
pci_stop_and_remove_bus_device(dev);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pcibios_remove_pci_devices - remove all devices under this bus
|
|
* @bus: the indicated PCI bus
|
|
*
|
|
* Remove all of the PCI devices under this bus both from the
|
|
* linux pci device tree, and from the powerpc EEH address cache.
|
|
*/
|
|
void pcibios_remove_pci_devices(struct pci_bus *bus)
|
|
{
|
|
__pcibios_remove_pci_devices(bus, 1);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pcibios_remove_pci_devices);
|
|
|
|
/**
|
|
* pcibios_add_pci_devices - adds new pci devices to bus
|
|
* @bus: the indicated PCI bus
|
|
*
|
|
* This routine will find and fixup new pci devices under
|
|
* the indicated bus. This routine presumes that there
|
|
* might already be some devices under this bridge, so
|
|
* it carefully tries to add only new devices. (And that
|
|
* is how this routine differs from other, similar pcibios
|
|
* routines.)
|
|
*/
|
|
void pcibios_add_pci_devices(struct pci_bus * bus)
|
|
{
|
|
int slotno, num, mode, pass, max;
|
|
struct pci_dev *dev;
|
|
struct device_node *dn = pci_bus_to_OF_node(bus);
|
|
|
|
eeh_add_device_tree_early(dn);
|
|
|
|
mode = PCI_PROBE_NORMAL;
|
|
if (ppc_md.pci_probe_mode)
|
|
mode = ppc_md.pci_probe_mode(bus);
|
|
|
|
if (mode == PCI_PROBE_DEVTREE) {
|
|
/* use ofdt-based probe */
|
|
of_rescan_bus(dn, bus);
|
|
} else if (mode == PCI_PROBE_NORMAL) {
|
|
/* use legacy probe */
|
|
slotno = PCI_SLOT(PCI_DN(dn->child)->devfn);
|
|
num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
|
|
if (!num)
|
|
return;
|
|
pcibios_setup_bus_devices(bus);
|
|
max = bus->busn_res.start;
|
|
for (pass = 0; pass < 2; pass++) {
|
|
list_for_each_entry(dev, &bus->devices, bus_list) {
|
|
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
|
|
dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
|
|
max = pci_scan_bridge(bus, dev,
|
|
max, pass);
|
|
}
|
|
}
|
|
}
|
|
pcibios_finish_adding_to_bus(bus);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pcibios_add_pci_devices);
|