#ifdef __KERNEL__ #ifndef _ASM_PCI_BRIDGE_H #define _ASM_PCI_BRIDGE_H /* * 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. */ struct device_node; struct pci_controller; /* Get the PCI host controller for an OF device */ extern struct pci_controller* pci_find_hose_for_OF_device(struct device_node* node); enum phb_types { phb_type_unknown = 0x0, phb_type_hypervisor = 0x1, phb_type_python = 0x10, phb_type_speedwagon = 0x11, phb_type_winnipeg = 0x12 }; /* * Structure of a PCI controller (host bridge) */ struct pci_controller { char what[8]; /* Eye catcher */ enum phb_types type; /* Type of hardware */ struct pci_controller *next; struct pci_bus *bus; void *arch_data; int first_busno; int last_busno; void *io_base_virt; unsigned long io_base_phys; /* Some machines have a non 1:1 mapping of * the PCI memory space in the CPU bus space */ unsigned long pci_mem_offset; unsigned long pci_io_offset; struct pci_ops *ops; /* Currently, we limit ourselves to 1 IO range and 3 mem * ranges since the common pci_bus structure can't handle more */ struct resource io_resource; struct resource mem_resources[3]; int mem_resource_count; int global_number; int local_number; unsigned long buid; unsigned long dma_window_base_cur; unsigned long dma_window_size; }; /* * pci_device_loc returns the bus number and device/function number * for a device on a PCI bus, given its device_node struct. * It returns 0 if OK, -1 on error. */ int pci_device_loc(struct device_node *dev, unsigned char *bus_ptr, unsigned char *devfn_ptr); struct device_node *fetch_dev_dn(struct pci_dev *dev); /* Get a device_node from a pci_dev. This code must be fast except in the case * where the sysdata is incorrect and needs to be fixed up (hopefully just once) */ static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev) { struct device_node *dn = (struct device_node *)(dev->sysdata); if (dn->devfn == dev->devfn && dn->busno == (dev->bus->number&0xff)) return dn; /* fast path. sysdata is good */ else return fetch_dev_dn(dev); } /* Use this macro after the PCI bus walk for max performance when it * is known that sysdata is correct. */ #define PCI_GET_DN(dev) ((struct device_node *)((dev)->sysdata)) #endif #endif /* __KERNEL__ */