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 /*
  52  * PCI stuff, for nodes representing PCI devices, pointed to
  53  * by device_node->data.
  54  */
  55 struct pci_controller;
  56 struct iommu_table;
  57
  58 struct pci_dn {
  59         int     busno;                  /* for pci devices */
  60         int     bussubno;               /* for pci devices */
  61         int     devfn;                  /* for pci devices */
  62         int     eeh_mode;               /* See eeh.h for possible EEH_MODEs */
  63         int     eeh_config_addr;
  64         int     eeh_capable;            /* from firmware */
  65         int     eeh_check_count;        /* # times driver ignored error */
  66         int     eeh_freeze_count;       /* # times this device froze up. */
  67         int     eeh_is_bridge;          /* device is pci-to-pci bridge */
  68
  69         int     pci_ext_config_space;   /* for pci devices */
  70         struct  pci_controller *phb;    /* for pci devices */
  71         struct  iommu_table *iommu_table;       /* for phb's or bridges */
  72         struct  pci_dev *pcidev;        /* back-pointer to the pci device */
  73         struct  device_node *node;      /* back-pointer to the device_node */
  74         u32     config_space[16];       /* saved PCI config space */
  75 };
  76
  77 /* Get the pointer to a device_node's pci_dn */
  78 #define PCI_DN(dn)      ((struct pci_dn *) (dn)->data)
  79
  80 struct device_node *fetch_dev_dn(struct pci_dev *dev);
  81
  82 /* Get a device_node from a pci_dev.  This code must be fast except
  83  * in the case where the sysdata is incorrect and needs to be fixed
  84  * up (this will only happen once).
  85  * In this case the sysdata will have been inherited from a PCI host
  86  * bridge or a PCI-PCI bridge further up the tree, so it will point
  87  * to a valid struct pci_dn, just not the one we want.
  88  */
  89 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
  90 {
  91         struct device_node *dn = dev->sysdata;
  92         struct pci_dn *pdn = dn->data;
  93
  94         if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
  95                 return dn;      /* fast path.  sysdata is good */
  96         return fetch_dev_dn(dev);
  97 }
  98
  99 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
 100 {
 101         if (bus->self)
 102                 return pci_device_to_OF_node(bus->self);
 103         else
 104                 return bus->sysdata; /* Must be root bus (PHB) */
 105 }
 106
 107 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
 108                                          struct device_node *dev);
 109
 110 extern int pcibios_remove_root_bus(struct pci_controller *phb);
 111
 112 extern void phbs_remap_io(void);
 113
 114 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
 115 {
 116         struct device_node *busdn = bus->sysdata;
 117
 118         BUG_ON(busdn == NULL);
 119         return PCI_DN(busdn)->phb;
 120 }
 121
 122 /* Return values for ppc_md.pci_probe_mode function */
 123 #define PCI_PROBE_NONE          -1      /* Don't look at this bus at all */
 124 #define PCI_PROBE_NORMAL        0       /* Do normal PCI probing */
 125 #define PCI_PROBE_DEVTREE       1       /* Instantiate from device tree */
 126
 127 #endif
 128 #endif /* __KERNEL__ */