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Diffstat (limited to 'include/asm-powerpc/pci-bridge.h')
| -rw-r--r-- | include/asm-powerpc/pci-bridge.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/include/asm-powerpc/pci-bridge.h b/include/asm-powerpc/pci-bridge.h new file mode 100644 index 00000000000..223ec7bd81d --- /dev/null +++ b/include/asm-powerpc/pci-bridge.h @@ -0,0 +1,153 @@ +#ifndef _ASM_POWERPC_PCI_BRIDGE_H +#define _ASM_POWERPC_PCI_BRIDGE_H + +#ifndef CONFIG_PPC64 +#include <asm-ppc/pci-bridge.h> +#else + +#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 */ + +#ifdef CONFIG_PPC_PSERIES + int eeh_mode; /* See eeh.h for possible EEH_MODEs */ + int eeh_config_addr; + 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 */ +#endif + 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; +} + +extern struct pci_controller * +pcibios_alloc_controller(struct device_node *dev); +extern void pcibios_free_controller(struct pci_controller *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 /* CONFIG_PPC64 */ +#endif |