#ifndef _ASM_POWERPC_PCI_BRIDGE_H #define _ASM_POWERPC_PCI_BRIDGE_H #ifdef __KERNEL__ #include #include #include #ifndef CONFIG_PPC64 struct device_node; struct pci_controller; /* * 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; struct device *parent; int first_busno; int last_busno; int self_busno; void __iomem *io_base_virt; resource_size_t io_base_phys; /* Some machines (PReP) have a non 1:1 mapping of * the PCI memory space in the CPU bus space */ resource_size_t pci_mem_offset; struct pci_ops *ops; volatile unsigned int __iomem *cfg_addr; volatile void __iomem *cfg_data; /* * Used for variants of PCI indirect handling and possible quirks: * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1 * EXT_REG - provides access to PCI-e extended registers * SURPRESS_PRIMARY_BUS - we surpress the setting of PCI_PRIMARY_BUS * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS * to determine which bus number to match on when generating type0 * config cycles * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with * hanging if we don't have link and try to do config cycles to * anything but the PHB. Only allow talking to the PHB if this is * set. */ #define PPC_INDIRECT_TYPE_SET_CFG_TYPE (0x00000001) #define PPC_INDIRECT_TYPE_EXT_REG (0x00000002) #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS (0x00000004) #define PPC_INDIRECT_TYPE_NO_PCIE_LINK (0x00000008) u32 indirect_type; /* 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; /* PCI domain number */ }; static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus) { return bus->sysdata; } /* These are used for config access before all the PCI probing has been done. */ int early_read_config_byte(struct pci_controller *hose, int bus, int dev_fn, int where, u8 *val); int early_read_config_word(struct pci_controller *hose, int bus, int dev_fn, int where, u16 *val); int early_read_config_dword(struct pci_controller *hose, int bus, int dev_fn, int where, u32 *val); int early_write_config_byte(struct pci_controller *hose, int bus, int dev_fn, int where, u8 val); int early_write_config_word(struct pci_controller *hose, int bus, int dev_fn, int where, u16 val); int early_write_config_dword(struct pci_controller *hose, int bus, int dev_fn, int where, u32 val); extern int early_find_capability(struct pci_controller *hose, int bus, int dev_fn, int cap); extern void setup_indirect_pci_nomap(struct pci_controller* hose, void __iomem *cfg_addr, void __iomem *cfg_data); extern void setup_indirect_pci(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data); extern void setup_grackle(struct pci_controller *hose); #else /* * 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; int node; void *arch_data; struct list_head list_node; struct device *parent; int first_busno; int last_busno; void __iomem *io_base_virt; void *io_base_alloc; resource_size_t io_base_phys; /* Some machines have a non 1:1 mapping of * the PCI memory space in the CPU bus space */ resource_size_t 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; unsigned long buid; unsigned long dma_window_base_cur; unsigned long dma_window_size; void *private_data; }; /* * PCI stuff, for nodes representing PCI devices, pointed to * by device_node->data. */ struct pci_controller; struct iommu_table; struct pci_dn { int busno; /* pci bus number */ int bussubno; /* pci subordinate bus number */ int devfn; /* pci device and function number */ int class_code; /* pci device class */ 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 */ int pci_ext_config_space; /* for pci devices */ #ifdef CONFIG_EEH int eeh_mode; /* See eeh.h for possible EEH_MODEs */ int eeh_config_addr; int eeh_pe_config_addr; /* new-style partition endpoint address */ int eeh_check_count; /* # times driver ignored error */ int eeh_freeze_count; /* # times this device froze up. */ int eeh_false_positives; /* # times this device reported #ff's */ u32 config_space[16]; /* saved PCI config space */ #endif }; /* 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) */ } /** Find the bus corresponding to the indicated device node */ struct pci_bus * pcibios_find_pci_bus(struct device_node *dn); /** Remove all of the PCI devices under this bus */ void pcibios_remove_pci_devices(struct pci_bus *bus); /** Discover new pci devices under this bus, and add them */ void pcibios_add_pci_devices(struct pci_bus * bus); void pcibios_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus); extern int pcibios_remove_root_bus(struct pci_controller *phb); 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; } extern void pcibios_free_controller(struct pci_controller *phb); extern void isa_bridge_find_early(struct pci_controller *hose); extern int pcibios_unmap_io_space(struct pci_bus *bus); extern int pcibios_map_io_space(struct pci_bus *bus); /* 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 */ #ifdef CONFIG_NUMA #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE)) #else #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1) #endif #endif /* CONFIG_PPC64 */ /* Get the PCI host controller for an OF device */ extern struct pci_controller* pci_find_hose_for_OF_device(struct device_node* node); /* Fill up host controller resources from the OF node */ extern void pci_process_bridge_OF_ranges(struct pci_controller *hose, struct device_node *dev, int primary); /* Allocate a new PCI host bridge structure */ extern struct pci_controller * pcibios_alloc_controller(struct device_node *dev); #ifdef CONFIG_PCI extern unsigned long pci_address_to_pio(phys_addr_t address); #else static inline unsigned long pci_address_to_pio(phys_addr_t address) { return (unsigned long)-1; } #endif #endif /* __KERNEL__ */ #endif