diff options
Diffstat (limited to 'include/asm-ppc64/pci-bridge.h')
| -rw-r--r-- | include/asm-ppc64/pci-bridge.h | 45 |
1 files changed, 39 insertions, 6 deletions
diff --git a/include/asm-ppc64/pci-bridge.h b/include/asm-ppc64/pci-bridge.h index c4f9023ea5e..6b4a5b1f695 100644 --- a/include/asm-ppc64/pci-bridge.h +++ b/include/asm-ppc64/pci-bridge.h @@ -48,19 +48,52 @@ struct pci_controller { 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 */ + 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 (hopefully just once) +/* 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 (dn->devfn == dev->devfn && dn->busno == dev->bus->number) + if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number) return dn; /* fast path. sysdata is good */ - else - return fetch_dev_dn(dev); + return fetch_dev_dn(dev); } static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus) @@ -83,7 +116,7 @@ static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus) struct device_node *busdn = bus->sysdata; BUG_ON(busdn == NULL); - return busdn->phb; + return PCI_DN(busdn)->phb; } #endif |