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
3.4 KiB
C
112 lines
3.4 KiB
C
/*
|
|
* The file intends to implement dynamic creation of EEH device, which will
|
|
* be bound with OF node and PCI device simutaneously. The EEH devices would
|
|
* be foundamental information for EEH core components to work proerly. Besides,
|
|
* We have to support multiple situations where dynamic creation of EEH device
|
|
* is required:
|
|
*
|
|
* 1) Before PCI emunation starts, we need create EEH devices according to the
|
|
* PCI sensitive OF nodes.
|
|
* 2) When PCI emunation is done, we need do the binding between PCI device and
|
|
* the associated EEH device.
|
|
* 3) DR (Dynamic Reconfiguration) would create PCI sensitive OF node. EEH device
|
|
* will be created while PCI sensitive OF node is detected from DR.
|
|
* 4) PCI hotplug needs redoing the binding between PCI device and EEH device. If
|
|
* PHB is newly inserted, we also need create EEH devices accordingly.
|
|
*
|
|
* Copyright Benjamin Herrenschmidt & Gavin Shan, IBM Corporation 2012.
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/gfp.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <asm/pci-bridge.h>
|
|
#include <asm/ppc-pci.h>
|
|
|
|
/**
|
|
* eeh_dev_init - Create EEH device according to OF node
|
|
* @dn: device node
|
|
* @data: PHB
|
|
*
|
|
* It will create EEH device according to the given OF node. The function
|
|
* might be called by PCI emunation, DR, PHB hotplug.
|
|
*/
|
|
void *eeh_dev_init(struct device_node *dn, void *data)
|
|
{
|
|
struct pci_controller *phb = data;
|
|
struct eeh_dev *edev;
|
|
|
|
/* Allocate EEH device */
|
|
edev = kzalloc(sizeof(*edev), GFP_KERNEL);
|
|
if (!edev) {
|
|
pr_warning("%s: out of memory\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
/* Associate EEH device with OF node */
|
|
PCI_DN(dn)->edev = edev;
|
|
edev->dn = dn;
|
|
edev->phb = phb;
|
|
INIT_LIST_HEAD(&edev->list);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* eeh_dev_phb_init_dynamic - Create EEH devices for devices included in PHB
|
|
* @phb: PHB
|
|
*
|
|
* Scan the PHB OF node and its child association, then create the
|
|
* EEH devices accordingly
|
|
*/
|
|
void eeh_dev_phb_init_dynamic(struct pci_controller *phb)
|
|
{
|
|
struct device_node *dn = phb->dn;
|
|
|
|
/* EEH PE for PHB */
|
|
eeh_phb_pe_create(phb);
|
|
|
|
/* EEH device for PHB */
|
|
eeh_dev_init(dn, phb);
|
|
|
|
/* EEH devices for children OF nodes */
|
|
traverse_pci_devices(dn, eeh_dev_init, phb);
|
|
}
|
|
|
|
/**
|
|
* eeh_dev_phb_init - Create EEH devices for devices included in existing PHBs
|
|
*
|
|
* Scan all the existing PHBs and create EEH devices for their OF
|
|
* nodes and their children OF nodes
|
|
*/
|
|
static int __init eeh_dev_phb_init(void)
|
|
{
|
|
struct pci_controller *phb, *tmp;
|
|
|
|
list_for_each_entry_safe(phb, tmp, &hose_list, list_node)
|
|
eeh_dev_phb_init_dynamic(phb);
|
|
|
|
pr_info("EEH: devices created\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
core_initcall(eeh_dev_phb_init);
|