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 struct device_node;
  15 struct pci_controller;
  16
  17 /* Get the PCI host controller for an OF device */
  18 extern struct pci_controller*
  19 pci_find_hose_for_OF_device(struct device_node* node);
  20
  21 enum phb_types {
  22         phb_type_unknown    = 0x0,
  23         phb_type_hypervisor = 0x1,
  24         phb_type_python     = 0x10,
  25         phb_type_speedwagon = 0x11,
  26         phb_type_winnipeg   = 0x12,
  27         phb_type_apple      = 0xff
  28 };
  29
  30 /*
  31  * Structure of a PCI controller (host bridge)
  32  */
  33 struct pci_controller {
  34         char what[8];                     /* Eye catcher      */
  35         enum phb_types type;              /* Type of hardware */
  36         struct pci_bus *bus;
  37         void *arch_data;
  38         struct list_head list_node;
  39
  40         int first_busno;
  41         int last_busno;
  42
  43         void *io_base_virt;
  44         unsigned long io_base_phys;
  45
  46         /* Some machines have a non 1:1 mapping of
  47          * the PCI memory space in the CPU bus space
  48          */
  49         unsigned long pci_mem_offset;
  50
  51         struct pci_ops *ops;
  52         volatile unsigned int *cfg_addr;
  53         volatile unsigned char *cfg_data;
  54
  55         /* Currently, we limit ourselves to 1 IO range and 3 mem
  56          * ranges since the common pci_bus structure can't handle more
  57          */
  58         struct resource io_resource;
  59         struct resource mem_resources[3];
  60         int mem_resource_count;
  61         int global_number;
  62         int local_number;
  63         unsigned long buid;
  64         unsigned long dma_window_base_cur;
  65         unsigned long dma_window_size;
  66 };
  67
  68 /*
  69  * pci_device_loc returns the bus number and device/function number
  70  * for a device on a PCI bus, given its device_node struct.
  71  * It returns 0 if OK, -1 on error.
  72  */
  73 extern int pci_device_loc(struct device_node *dev, unsigned char *bus_ptr,
  74                           unsigned char *devfn_ptr);
  75
  76 struct device_node *fetch_dev_dn(struct pci_dev *dev);
  77
  78 /* Get a device_node from a pci_dev.  This code must be fast except in the case
  79  * where the sysdata is incorrect and needs to be fixed up (hopefully just once)
  80  */
  81 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
  82 {
  83         struct device_node *dn = (struct device_node *)(dev->sysdata);
  84         if (dn->devfn == dev->devfn && dn->busno == (dev->bus->number&0xff))
  85                 return dn;      /* fast path.  sysdata is good */
  86         else
  87                 return fetch_dev_dn(dev);
  88 }
  89
  90 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
  91                                          struct device_node *dev, int primary);
  92
  93 /* Use this macro after the PCI bus walk for max performance when it
  94  * is known that sysdata is correct.
  95  */
  96 #define PCI_GET_DN(dev) ((struct device_node *)((dev)->sysdata))
  97
  98 #endif
  99 #endif /* __KERNEL__ */