eb740b5f3e
Original EEH implementation depends on struct pci_dn heavily. However, EEH shouldn't depend on that actually because EEH needn't share much information with other PCI components. That's to say, EEH should have worked independently. The patch introduces struct eeh_dev so that EEH core components needn't be working based on struct pci_dn in future. Also, struct pci_dn, struct eeh_dev instances are created in dynamic fasion and the binding with EEH device, OF node, PCI device is implemented as well. The EEH devices are created after PHBs are detected and initialized, but PCI emunation hasn't started yet. Apart from that, PHB might be created dynamically through DLPAR component and the EEH devices should be creatd as well. Another case might be OF node is created dynamically by DR (Dynamic Reconfiguration), which has been defined by PAPR. For those OF nodes created by DR, EEH devices should be also created accordingly. The binding between EEH device and OF node is done while the EEH device is initially created. The binding between EEH device and PCI device should be done after PCI emunation is done. Besides, PCI hotplug also needs the binding so that the EEH devices could be traced from the newly coming PCI buses or PCI devices. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
/*
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* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
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* <benh@kernel.crashing.org>
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* and Arnd Bergmann, IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#undef DEBUG
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/mod_devicetable.h>
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#include <linux/pci.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_platform.h>
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#include <linux/atomic.h>
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#include <asm/errno.h>
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#include <asm/topology.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/eeh.h>
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#ifdef CONFIG_PPC_OF_PLATFORM_PCI
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/* The probing of PCI controllers from of_platform is currently
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* 64 bits only, mostly due to gratuitous differences between
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* the 32 and 64 bits PCI code on PowerPC and the 32 bits one
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* lacking some bits needed here.
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*/
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static int __devinit of_pci_phb_probe(struct platform_device *dev)
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{
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struct pci_controller *phb;
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/* Check if we can do that ... */
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if (ppc_md.pci_setup_phb == NULL)
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return -ENODEV;
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pr_info("Setting up PCI bus %s\n", dev->dev.of_node->full_name);
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/* Alloc and setup PHB data structure */
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phb = pcibios_alloc_controller(dev->dev.of_node);
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if (!phb)
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return -ENODEV;
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/* Setup parent in sysfs */
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phb->parent = &dev->dev;
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/* Setup the PHB using arch provided callback */
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if (ppc_md.pci_setup_phb(phb)) {
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pcibios_free_controller(phb);
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return -ENODEV;
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}
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/* Process "ranges" property */
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pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0);
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/* Init pci_dn data structures */
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pci_devs_phb_init_dynamic(phb);
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/* Create EEH devices for the PHB */
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eeh_dev_phb_init_dynamic(phb);
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/* Register devices with EEH */
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#ifdef CONFIG_EEH
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if (dev->dev.of_node->child)
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eeh_add_device_tree_early(dev->dev.of_node);
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#endif /* CONFIG_EEH */
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/* Scan the bus */
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pcibios_scan_phb(phb);
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if (phb->bus == NULL)
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return -ENXIO;
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/* Claim resources. This might need some rework as well depending
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* wether we are doing probe-only or not, like assigning unassigned
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* resources etc...
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*/
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pcibios_claim_one_bus(phb->bus);
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/* Finish EEH setup */
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#ifdef CONFIG_EEH
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eeh_add_device_tree_late(phb->bus);
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#endif
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/* Add probed PCI devices to the device model */
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pci_bus_add_devices(phb->bus);
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return 0;
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}
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static struct of_device_id of_pci_phb_ids[] = {
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{ .type = "pci", },
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{ .type = "pcix", },
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{ .type = "pcie", },
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{ .type = "pciex", },
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{ .type = "ht", },
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{}
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};
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static struct platform_driver of_pci_phb_driver = {
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.probe = of_pci_phb_probe,
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.driver = {
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.name = "of-pci",
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.owner = THIS_MODULE,
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.of_match_table = of_pci_phb_ids,
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},
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};
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static __init int of_pci_phb_init(void)
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{
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return platform_driver_register(&of_pci_phb_driver);
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}
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device_initcall(of_pci_phb_init);
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#endif /* CONFIG_PPC_OF_PLATFORM_PCI */
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