include/asm-powerpc/pci-bridge.h

   1 #ifndef _ASM_POWERPC_PCI_BRIDGE_H
   2 #define _ASM_POWERPC_PCI_BRIDGE_H
   3 #ifdef __KERNEL__
   4
   5 #ifndef CONFIG_PPC64
   6 #include <asm-ppc/pci-bridge.h>
   7 #else
   8
   9 #include <linux/pci.h>
  10 #include <linux/list.h>
  11
  12 /*
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version
  16  * 2 of the License, or (at your option) any later version.
  17  */
  18
  19 /*
  20  * Structure of a PCI controller (host bridge)
  21  */
  22 struct pci_controller {
  23         struct pci_bus *bus;
  24         char is_dynamic;
  25         int node;
  26         void *arch_data;
  27         struct list_head list_node;
  28         struct device *parent;
  29
  30         int first_busno;
  31         int last_busno;
  32
  33         void __iomem *io_base_virt;
  34         resource_size_t io_base_phys;
  35
  36         /* Some machines have a non 1:1 mapping of
  37          * the PCI memory space in the CPU bus space
  38          */
  39         resource_size_t pci_mem_offset;
  40         unsigned long pci_io_size;
  41
  42         struct pci_ops *ops;
  43         volatile unsigned int __iomem *cfg_addr;
  44         volatile void __iomem *cfg_data;
  45
  46         /* Currently, we limit ourselves to 1 IO range and 3 mem
  47          * ranges since the common pci_bus structure can't handle more
  48          */
  49         struct resource io_resource;
  50         struct resource mem_resources[3];
  51         int global_number;
  52         int local_number;
  53         unsigned long buid;
  54         unsigned long dma_window_base_cur;
  55         unsigned long dma_window_size;
  56
  57         void *private_data;
  58 };
  59
  60 /*
  61  * PCI stuff, for nodes representing PCI devices, pointed to
  62  * by device_node->data.
  63  */
  64 struct pci_controller;
  65 struct iommu_table;
  66
  67 struct pci_dn {
  68         int     busno;                  /* pci bus number */
  69         int     bussubno;               /* pci subordinate bus number */
  70         int     devfn;                  /* pci device and function number */
  71         int     class_code;             /* pci device class */
  72
  73 #ifdef CONFIG_PPC_PSERIES
  74         int     eeh_mode;               /* See eeh.h for possible EEH_MODEs */
  75         int     eeh_config_addr;
  76         int     eeh_pe_config_addr; /* new-style partition endpoint address */
  77         int     eeh_check_count;        /* # times driver ignored error */
  78         int     eeh_freeze_count;       /* # times this device froze up. */
  79 #endif
  80         int     pci_ext_config_space;   /* for pci devices */
  81         struct  pci_controller *phb;    /* for pci devices */
  82         struct  iommu_table *iommu_table;       /* for phb's or bridges */
  83         struct  pci_dev *pcidev;        /* back-pointer to the pci device */
  84         struct  device_node *node;      /* back-pointer to the device_node */
  85         u32     config_space[16];       /* saved PCI config space */
  86 };
  87
  88 /* Get the pointer to a device_node's pci_dn */
  89 #define PCI_DN(dn)      ((struct pci_dn *) (dn)->data)
  90
  91 struct device_node *fetch_dev_dn(struct pci_dev *dev);
  92
  93 /* Get a device_node from a pci_dev.  This code must be fast except
  94  * in the case where the sysdata is incorrect and needs to be fixed
  95  * up (this will only happen once).
  96  * In this case the sysdata will have been inherited from a PCI host
  97  * bridge or a PCI-PCI bridge further up the tree, so it will point
  98  * to a valid struct pci_dn, just not the one we want.
  99  */
 100 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
 101 {
 102         struct device_node *dn = dev->sysdata;
 103         struct pci_dn *pdn = dn->data;
 104
 105         if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
 106                 return dn;      /* fast path.  sysdata is good */
 107         return fetch_dev_dn(dev);
 108 }
 109
 110 static inline int pci_device_from_OF_node(struct device_node *np,
 111                                           u8 *bus, u8 *devfn)
 112 {
 113         if (!PCI_DN(np))
 114                 return -ENODEV;
 115         *bus = PCI_DN(np)->busno;
 116         *devfn = PCI_DN(np)->devfn;
 117         return 0;
 118 }
 119
 120 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
 121 {
 122         if (bus->self)
 123                 return pci_device_to_OF_node(bus->self);
 124         else
 125                 return bus->sysdata; /* Must be root bus (PHB) */
 126 }
 127
 128 /** Find the bus corresponding to the indicated device node */
 129 struct pci_bus * pcibios_find_pci_bus(struct device_node *dn);
 130
 131 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
 132                                          struct device_node *dev, int primary);
 133
 134 /** Remove all of the PCI devices under this bus */
 135 void pcibios_remove_pci_devices(struct pci_bus *bus);
 136
 137 /** Discover new pci devices under this bus, and add them */
 138 void pcibios_add_pci_devices(struct pci_bus * bus);
 139 void pcibios_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus);
 140
 141 extern int pcibios_remove_root_bus(struct pci_controller *phb);
 142
 143 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
 144 {
 145         struct device_node *busdn = bus->sysdata;
 146
 147         BUG_ON(busdn == NULL);
 148         return PCI_DN(busdn)->phb;
 149 }
 150
 151 extern struct pci_controller*
 152 pci_find_hose_for_OF_device(struct device_node* node);
 153
 154 extern struct pci_controller *
 155 pcibios_alloc_controller(struct device_node *dev);
 156 extern void pcibios_free_controller(struct pci_controller *phb);
 157
 158 #ifdef CONFIG_PCI
 159 extern unsigned long pci_address_to_pio(phys_addr_t address);
 160 #else
 161 static inline unsigned long pci_address_to_pio(phys_addr_t address)
 162 {
 163         return (unsigned long)-1;
 164 }
 165 #endif
 166
 167 /* Return values for ppc_md.pci_probe_mode function */
 168 #define PCI_PROBE_NONE          -1      /* Don't look at this bus at all */
 169 #define PCI_PROBE_NORMAL        0       /* Do normal PCI probing */
 170 #define PCI_PROBE_DEVTREE       1       /* Instantiate from device tree */
 171
 172 #ifdef CONFIG_NUMA
 173 #define PHB_SET_NODE(PHB, NODE)         ((PHB)->node = (NODE))
 174 #else
 175 #define PHB_SET_NODE(PHB, NODE)         ((PHB)->node = -1)
 176 #endif
 177
 178 #endif /* CONFIG_PPC64 */
 179 #endif /* __KERNEL__ */
 180 #endif