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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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dad32bbf43
For I/O DLPAR to work properly, the kernel needs to allow for dynamic assignment of the irq field of the pci_dev structure upon dynamic bus addition. This patch moves the assignment of that field from pSeries_final_fixup() to pcibios_fixup_bus(), which enables dynamic assignment for the children of a newly added bus. Currently, pci_devs receive their irq numbers in one of two ways. The irq line is either read at boot for all pci_devs, or read by the rpaphp module at slot enable time. The latter is no longer sufficient for DLPAR addition of slots that don't qualify as PCI-hotplug capable. This solution handles the cases of boot and dynamic add. Signed-off-by: John Rose <johnrose@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/*
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* c 2001 PPC 64 Team, 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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#ifndef __PPC_KERNEL_PCI_H__
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#define __PPC_KERNEL_PCI_H__
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#include <linux/pci.h>
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#include <asm/pci-bridge.h>
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extern unsigned long isa_io_base;
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extern void pci_setup_pci_controller(struct pci_controller *hose);
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extern void pci_setup_phb_io(struct pci_controller *hose, int primary);
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extern void pci_setup_phb_io_dynamic(struct pci_controller *hose, int primary);
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extern struct list_head hose_list;
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extern int global_phb_number;
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extern unsigned long find_and_init_phbs(void);
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extern struct pci_dev *ppc64_isabridge_dev; /* may be NULL if no ISA bus */
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/* PCI device_node operations */
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struct device_node;
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typedef void *(*traverse_func)(struct device_node *me, void *data);
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void *traverse_pci_devices(struct device_node *start, traverse_func pre,
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void *data);
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void pci_devs_phb_init(void);
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void pci_devs_phb_init_dynamic(struct pci_controller *phb);
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struct device_node *fetch_dev_dn(struct pci_dev *dev);
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/* PCI address cache management routines */
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void pci_addr_cache_insert_device(struct pci_dev *dev);
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void pci_addr_cache_remove_device(struct pci_dev *dev);
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/* From rtas_pci.h */
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void init_pci_config_tokens (void);
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unsigned long get_phb_buid (struct device_node *);
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/* From pSeries_pci.h */
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extern void pSeries_final_fixup(void);
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extern void pSeries_irq_bus_setup(struct pci_bus *bus);
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extern unsigned long pci_probe_only;
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extern unsigned long pci_assign_all_buses;
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extern int pci_read_irq_line(struct pci_dev *pci_dev);
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#endif /* __PPC_KERNEL_PCI_H__ */
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