#ifndef _ASM_POWERPC_PCI_BRIDGE_H #define _ASM_POWERPC_PCI_BRIDGE_H #ifdef __KERNEL__ /* * 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. */ #include #include #include struct device_node; enum { /* Force re-assigning all resources (ignore firmware * setup completely) */ PPC_PCI_REASSIGN_ALL_RSRC = 0x00000001, /* Re-assign all bus numbers */ PPC_PCI_REASSIGN_ALL_BUS = 0x00000002, /* Do not try to assign, just use existing setup */ PPC_PCI_PROBE_ONLY = 0x00000004, /* Don't bother with ISA alignment unless the bridge has * ISA forwarding enabled */ PPC_PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* Enable domain numbers in /proc */ PPC_PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* ... except for domain 0 */ PPC_PCI_COMPAT_DOMAIN_0 = 0x00000020, }; #ifdef CONFIG_PCI extern unsigned int ppc_pci_flags; static inline void ppc_pci_set_flags(int flags) { ppc_pci_flags = flags; } static inline void ppc_pci_add_flags(int flags) { ppc_pci_flags |= flags; } static inline int ppc_pci_has_flag(int flag) { return (ppc_pci_flags & flag); } #else static inline void ppc_pci_set_flags(int flags) { } static inline void ppc_pci_add_flags(int flags) { } static inline int ppc_pci_has_flag(int flag) { return 0; } #endif /* * Structure of a PCI controller (host bridge) */ struct pci_controller { struct pci_bus *bus; char is_dynamic; #ifdef CONFIG_PPC64 int node; #endif struct device_node *dn; struct list_head list_node; struct device *parent; int first_busno; int last_busno; int self_busno; void __iomem *io_base_virt; #ifdef CONFIG_PPC64 void *io_base_alloc; #endif resource_size_t io_base_phys; resource_size_t pci_io_size; /* 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; /* Some machines have a special region to forward the ISA * "memory" cycles such as VGA memory regions. Left to 0 * if unsupported */ resource_size_t isa_mem_phys; resource_size_t isa_mem_size; struct pci_ops *ops; unsigned int __iomem *cfg_addr; 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. * BIG_ENDIAN - cfg_addr is a big endian register * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on * the PLB4. Effectively disable MRM commands by setting this. */ #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 #define PPC_INDIRECT_TYPE_BIG_ENDIAN 0x00000010 #define PPC_INDIRECT_TYPE_BROKEN_MRM 0x00000020 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 */ resource_size_t dma_window_base_cur; resource_size_t dma_window_size; #ifdef CONFIG_PPC64 unsigned long buid; void *private_data; #endif /* CONFIG_PPC64 */ }; /* These are used for config access before all the PCI probing has been done. */ extern int early_read_config_byte(struct pci_controller *hose, int bus, int dev_fn, int where, u8 *val); extern int early_read_config_word(struct pci_controller *hose, int bus, int dev_fn, int where, u16 *val); extern int early_read_config_dword(struct pci_controller *hose, int bus, int dev_fn, int where, u32 *val); extern int early_write_config_byte(struct pci_controller *hose, int bus, int dev_fn, int where, u8 val); extern int early_write_config_word(struct pci_controller *hose, int bus, int dev_fn, int where, u16 val); extern 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(struct pci_controller* hose, resource_size_t cfg_addr, resource_size_t cfg_data, u32 flags); #ifndef CONFIG_PPC64 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus) { return bus->sysdata; } static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus) { struct pci_controller *host; if (bus->self) return pci_device_to_OF_node(bus->self); host = pci_bus_to_host(bus); return host ? host->dn : NULL; } static inline int isa_vaddr_is_ioport(void __iomem *address) { /* No specific ISA handling on ppc32 at this stage, it * all goes through PCI */ return 0; } #else /* CONFIG_PPC64 */ /* * PCI stuff, for nodes representing PCI devices, pointed to * by device_node->data. */ struct iommu_table; struct pci_dn { int busno; /* pci bus number */ int devfn; /* pci device and function number */ struct pci_controller *phb; /* for pci devices */ struct iommu_table *iommu_table; /* for phb's or bridges */ struct device_node *node; /* back-pointer to the device_node */ int pci_ext_config_space; /* for pci devices */ #ifdef CONFIG_EEH struct pci_dev *pcidev; /* back-pointer to the pci device */ int class_code; /* pci device class */ 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) extern struct device_node *fetch_dev_dn(struct pci_dev *dev); extern void * update_dn_pci_info(struct device_node *dn, void *data); /* 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 */ extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn); /** Remove all of the PCI devices under this bus */ extern void pcibios_remove_pci_devices(struct pci_bus *bus); /** Discover new pci devices under this bus, and add them */ extern void pcibios_add_pci_devices(struct pci_bus *bus); static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus) { struct device_node *busdn = bus->sysdata; BUG_ON(busdn == NULL); return PCI_DN(busdn)->phb; } extern void isa_bridge_find_early(struct pci_controller *hose); static inline int isa_vaddr_is_ioport(void __iomem *address) { /* Check if address hits the reserved legacy IO range */ unsigned long ea = (unsigned long)address; return ea >= ISA_IO_BASE && ea < ISA_IO_END; } extern int pcibios_unmap_io_space(struct pci_bus *bus); extern int pcibios_map_io_space(struct pci_bus *bus); #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 & free a PCI host bridge structure */ extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev); extern void pcibios_free_controller(struct pci_controller *phb); extern void pcibios_setup_phb_resources(struct pci_controller *hose); #ifdef CONFIG_PCI extern int pcibios_vaddr_is_ioport(void __iomem *address); #else static inline int pcibios_vaddr_is_ioport(void __iomem *address) { return 0; } #endif /* CONFIG_PCI */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_PCI_BRIDGE_H */