1635317fac
This patch pulls the PCI-related junk out of struct device_node and puts it in a separate structure, struct pci_dn. The device_node now just has a void * pointer in it, which points to a struct pci_dn for nodes that represent PCI devices. It could potentially be used in future for device-specific data for other sorts of devices, such as virtual I/O devices. Signed-off-by: Paul Mackerras <paulus@samba.org>
124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
#ifdef __KERNEL__
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#ifndef _ASM_PCI_BRIDGE_H
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#define _ASM_PCI_BRIDGE_H
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#include <linux/pci.h>
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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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* Structure of a PCI controller (host bridge)
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*/
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struct pci_controller {
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struct pci_bus *bus;
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char is_dynamic;
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void *arch_data;
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struct list_head list_node;
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int first_busno;
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int last_busno;
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void __iomem *io_base_virt;
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unsigned long io_base_phys;
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/* Some machines have a non 1:1 mapping of
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* the PCI memory space in the CPU bus space
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*/
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unsigned long pci_mem_offset;
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unsigned long pci_io_size;
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struct pci_ops *ops;
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volatile unsigned int __iomem *cfg_addr;
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volatile unsigned char __iomem *cfg_data;
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/* Currently, we limit ourselves to 1 IO range and 3 mem
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* ranges since the common pci_bus structure can't handle more
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*/
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struct resource io_resource;
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struct resource mem_resources[3];
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int global_number;
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int local_number;
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unsigned long buid;
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unsigned long dma_window_base_cur;
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unsigned long dma_window_size;
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};
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/*
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* PCI stuff, for nodes representing PCI devices, pointed to
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* by device_node->data.
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*/
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struct pci_controller;
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struct iommu_table;
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struct pci_dn {
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int busno; /* for pci devices */
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int bussubno; /* for pci devices */
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int devfn; /* for pci devices */
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int eeh_mode; /* See eeh.h for possible EEH_MODEs */
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int eeh_config_addr;
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int eeh_capable; /* from firmware */
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int eeh_check_count; /* # times driver ignored error */
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int eeh_freeze_count; /* # times this device froze up. */
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int eeh_is_bridge; /* device is pci-to-pci bridge */
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int pci_ext_config_space; /* for pci devices */
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struct pci_controller *phb; /* for pci devices */
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struct iommu_table *iommu_table; /* for phb's or bridges */
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struct pci_dev *pcidev; /* back-pointer to the pci device */
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struct device_node *node; /* back-pointer to the device_node */
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u32 config_space[16]; /* saved PCI config space */
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};
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/* Get the pointer to a device_node's pci_dn */
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#define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
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struct device_node *fetch_dev_dn(struct pci_dev *dev);
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/* Get a device_node from a pci_dev. This code must be fast except
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* in the case where the sysdata is incorrect and needs to be fixed
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* up (this will only happen once).
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* In this case the sysdata will have been inherited from a PCI host
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* bridge or a PCI-PCI bridge further up the tree, so it will point
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* to a valid struct pci_dn, just not the one we want.
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*/
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static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
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{
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struct device_node *dn = dev->sysdata;
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struct pci_dn *pdn = dn->data;
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if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
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return dn; /* fast path. sysdata is good */
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return fetch_dev_dn(dev);
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}
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static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
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{
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if (bus->self)
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return pci_device_to_OF_node(bus->self);
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else
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return bus->sysdata; /* Must be root bus (PHB) */
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}
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extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
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struct device_node *dev);
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extern int pcibios_remove_root_bus(struct pci_controller *phb);
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extern void phbs_remap_io(void);
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static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
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{
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struct device_node *busdn = bus->sysdata;
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BUG_ON(busdn == NULL);
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return PCI_DN(busdn)->phb;
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}
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#endif
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#endif /* __KERNEL__ */
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