#ifdef __KERNEL__ #ifndef _ASM_PCI_BRIDGE_H #define _ASM_PCI_BRIDGE_H #include <linux/config.h> #include <linux/pci.h> #include <linux/list.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. */ /* * Structure of a PCI controller (host bridge) */ struct pci_controller { struct pci_bus *bus; char is_dynamic; void *arch_data; struct list_head list_node; int first_busno; int last_busno; void __iomem *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_size; struct pci_ops *ops; volatile unsigned int __iomem *cfg_addr; volatile void __iomem *cfg_data; /* 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 global_number; int local_number; unsigned long buid; unsigned long dma_window_base_cur; unsigned long dma_window_size; }; /* * PCI stuff, for nodes representing PCI devices, pointed to * by device_node->data. */ struct pci_controller; struct iommu_table; struct pci_dn { int busno; /* for pci devices */ int bussubno; /* for pci devices */ int devfn; /* for pci devices */ int eeh_mode; /* See eeh.h for possible EEH_MODEs */ int eeh_config_addr; int eeh_capable; /* from firmware */ int eeh_check_count; /* # times driver ignored error */ int eeh_freeze_count; /* # times this device froze up. */ int eeh_is_bridge; /* device is pci-to-pci bridge */ int pci_ext_config_space; /* for pci devices */ struct pci_controller *phb; /* for pci devices */ struct iommu_table *iommu_table; /* for phb's or bridges */ struct pci_dev *pcidev; /* back-pointer to the pci device */ struct device_node *node; /* back-pointer to the device_node */ #ifdef CONFIG_PPC_ISERIES struct list_head Device_List; int Irq; /* Assigned IRQ */ int Flags; /* Possible flags(disable/bist)*/ u8 LogicalSlot; /* Hv Slot Index for Tces */ #endif u32 config_space[16]; /* saved PCI config space */ }; /* Get the pointer to a device_node's pci_dn */ #define PCI_DN(dn) ((struct pci_dn *) (dn)->data) 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 (this will only happen once). * In this case the sysdata will have been inherited from a PCI host * bridge or a PCI-PCI bridge further up the tree, so it will point * to a valid struct pci_dn, just not the one we want. */ static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev) { struct device_node *dn = dev->sysdata; struct pci_dn *pdn = dn->data; if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number) return dn; /* fast path. sysdata is good */ return fetch_dev_dn(dev); } static inline int pci_device_from_OF_node(struct device_node *np, u8 *bus, u8 *devfn) { if (!PCI_DN(np)) return -ENODEV; *bus = PCI_DN(np)->busno; *devfn = PCI_DN(np)->devfn; return 0; } static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus) { if (bus->self) return pci_device_to_OF_node(bus->self); else return bus->sysdata; /* Must be root bus (PHB) */ } extern void pci_process_bridge_OF_ranges(struct pci_controller *hose, struct device_node *dev, int primary); extern int pcibios_remove_root_bus(struct pci_controller *phb); extern void phbs_remap_io(void); static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus) { struct device_node *busdn = bus->sysdata; BUG_ON(busdn == NULL); return PCI_DN(busdn)->phb; } /* Return values for ppc_md.pci_probe_mode function */ #define PCI_PROBE_NONE -1 /* Don't look at this bus at all */ #define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */ #define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */ #endif #endif /* __KERNEL__ */