include/asm-ppc64/pci-bridge.h

   1 #ifdef __KERNEL__
   2 #ifndef _ASM_PCI_BRIDGE_H
   3 #define _ASM_PCI_BRIDGE_H
   4
   5 #include <linux/pci.h>
   6
   7 /*
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version
  11  * 2 of the License, or (at your option) any later version.
  12  */
  13
  14 /*
  15  * Structure of a PCI controller (host bridge)
  16  */
  17 struct pci_controller {
  18         struct pci_bus *bus;
  19         char is_dynamic;
  20         void *arch_data;
  21         struct list_head list_node;
  22
  23         int first_busno;
  24         int last_busno;
  25
  26         void __iomem *io_base_virt;
  27         unsigned long io_base_phys;
  28
  29         /* Some machines have a non 1:1 mapping of
  30          * the PCI memory space in the CPU bus space
  31          */
  32         unsigned long pci_mem_offset;
  33         unsigned long pci_io_size;
  34
  35         struct pci_ops *ops;
  36         volatile unsigned int __iomem *cfg_addr;
  37         volatile unsigned char __iomem *cfg_data;
  38
  39         /* Currently, we limit ourselves to 1 IO range and 3 mem
  40          * ranges since the common pci_bus structure can't handle more
  41          */
  42         struct resource io_resource;
  43         struct resource mem_resources[3];
  44         int global_number;
  45         int local_number;
  46         unsigned long buid;
  47         unsigned long dma_window_base_cur;
  48         unsigned long dma_window_size;
  49 };
  50
  51 struct device_node *fetch_dev_dn(struct pci_dev *dev);
  52
  53 /* Get a device_node from a pci_dev.  This code must be fast except in the case
  54  * where the sysdata is incorrect and needs to be fixed up (hopefully just once)
  55  */
  56 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
  57 {
  58         struct device_node *dn = dev->sysdata;
  59
  60         if (dn->devfn == dev->devfn && dn->busno == dev->bus->number)
  61                 return dn;      /* fast path.  sysdata is good */
  62         else
  63                 return fetch_dev_dn(dev);
  64 }
  65
  66 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
  67 {
  68         if (bus->self)
  69                 return pci_device_to_OF_node(bus->self);
  70         else
  71                 return bus->sysdata; /* Must be root bus (PHB) */
  72 }
  73
  74 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
  75                                          struct device_node *dev);
  76
  77 extern int pcibios_remove_root_bus(struct pci_controller *phb);
  78
  79 extern void phbs_remap_io(void);
  80
  81 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
  82 {
  83         struct device_node *busdn = bus->sysdata;
  84
  85         BUG_ON(busdn == NULL);
  86         return busdn->phb;
  87 }
  88
  89 #endif
  90 #endif /* __KERNEL__ */