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/config.h>
   6 #include <linux/pci.h>
   7 #include <linux/list.h>
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version
  13  * 2 of the License, or (at your option) any later version.
  14  */
  15
  16 /*
  17  * Structure of a PCI controller (host bridge)
  18  */
  19 struct pci_controller {
  20         struct pci_bus *bus;
  21         char is_dynamic;
  22         void *arch_data;
  23         struct list_head list_node;
  24
  25         int first_busno;
  26         int last_busno;
  27
  28         void __iomem *io_base_virt;
  29         unsigned long io_base_phys;
  30
  31         /* Some machines have a non 1:1 mapping of
  32          * the PCI memory space in the CPU bus space
  33          */
  34         unsigned long pci_mem_offset;
  35         unsigned long pci_io_size;
  36
  37         struct pci_ops *ops;
  38         volatile unsigned int __iomem *cfg_addr;
  39         volatile void __iomem *cfg_data;
  40
  41         /* Currently, we limit ourselves to 1 IO range and 3 mem
  42          * ranges since the common pci_bus structure can't handle more
  43          */
  44         struct resource io_resource;
  45         struct resource mem_resources[3];
  46         int global_number;
  47         int local_number;
  48         unsigned long buid;
  49         unsigned long dma_window_base_cur;
  50         unsigned long dma_window_size;
  51 };
  52
  53 /*
  54  * PCI stuff, for nodes representing PCI devices, pointed to
  55  * by device_node->data.
  56  */
  57 struct pci_controller;
  58 struct iommu_table;
  59
  60 struct pci_dn {
  61         int     busno;                  /* for pci devices */
  62         int     bussubno;               /* for pci devices */
  63         int     devfn;                  /* for pci devices */
  64         int     eeh_mode;               /* See eeh.h for possible EEH_MODEs */
  65         int     eeh_config_addr;
  66         int     eeh_capable;            /* from firmware */
  67         int     eeh_check_count;        /* # times driver ignored error */
  68         int     eeh_freeze_count;       /* # times this device froze up. */
  69         int     eeh_is_bridge;          /* device is pci-to-pci bridge */
  70
  71         int     pci_ext_config_space;   /* for pci devices */
  72         struct  pci_controller *phb;    /* for pci devices */
  73         struct  iommu_table *iommu_table;       /* for phb's or bridges */
  74         struct  pci_dev *pcidev;        /* back-pointer to the pci device */
  75         struct  device_node *node;      /* back-pointer to the device_node */
  76 #ifdef CONFIG_PPC_ISERIES
  77         struct  list_head Device_List;
  78         int             Irq;            /* Assigned IRQ */
  79         int             Flags;          /* Possible flags(disable/bist)*/
  80         u8              LogicalSlot;    /* Hv Slot Index for Tces */
  81 #endif
  82         u32     config_space[16];       /* saved PCI config space */
  83 };
  84
  85 /* Get the pointer to a device_node's pci_dn */
  86 #define PCI_DN(dn)      ((struct pci_dn *) (dn)->data)
  87
  88 struct device_node *fetch_dev_dn(struct pci_dev *dev);
  89
  90 /* Get a device_node from a pci_dev.  This code must be fast except
  91  * in the case where the sysdata is incorrect and needs to be fixed
  92  * up (this will only happen once).
  93  * In this case the sysdata will have been inherited from a PCI host
  94  * bridge or a PCI-PCI bridge further up the tree, so it will point
  95  * to a valid struct pci_dn, just not the one we want.
  96  */
  97 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
  98 {
  99         struct device_node *dn = dev->sysdata;
 100         struct pci_dn *pdn = dn->data;
 101
 102         if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
 103                 return dn;      /* fast path.  sysdata is good */
 104         return fetch_dev_dn(dev);
 105 }
 106
 107 static inline int pci_device_from_OF_node(struct device_node *np,
 108                                           u8 *bus, u8 *devfn)
 109 {
 110         if (!PCI_DN(np))
 111                 return -ENODEV;
 112         *bus = PCI_DN(np)->busno;
 113         *devfn = PCI_DN(np)->devfn;
 114         return 0;
 115 }
 116
 117 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
 118 {
 119         if (bus->self)
 120                 return pci_device_to_OF_node(bus->self);
 121         else
 122                 return bus->sysdata; /* Must be root bus (PHB) */
 123 }
 124
 125 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
 126                                          struct device_node *dev);
 127
 128 extern int pcibios_remove_root_bus(struct pci_controller *phb);
 129
 130 extern void phbs_remap_io(void);
 131
 132 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
 133 {
 134         struct device_node *busdn = bus->sysdata;
 135
 136         BUG_ON(busdn == NULL);
 137         return PCI_DN(busdn)->phb;
 138 }
 139
 140 /* Return values for ppc_md.pci_probe_mode function */
 141 #define PCI_PROBE_NONE          -1      /* Don't look at this bus at all */
 142 #define PCI_PROBE_NORMAL        0       /* Do normal PCI probing */
 143 #define PCI_PROBE_DEVTREE       1       /* Instantiate from device tree */
 144
 145 #endif
 146 #endif /* __KERNEL__ */