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
  58 /*
  59  * PCI stuff, for nodes representing PCI devices, pointed to
  60  * by device_node->data.
  61  */
  62 struct pci_controller;
  63 struct iommu_table;
  64
  65 struct pci_dn {
  66         int     busno;                  /* pci bus number */
  67         int     bussubno;               /* pci subordinate bus number */
  68         int     devfn;                  /* pci device and function number */
  69         int     class_code;             /* pci device class */
  70
  71 #ifdef CONFIG_PPC_PSERIES
  72         int     eeh_mode;               /* See eeh.h for possible EEH_MODEs */
  73         int     eeh_config_addr;
  74         int     eeh_pe_config_addr; /* new-style partition endpoint address */
  75         int     eeh_check_count;        /* # times driver ignored error */
  76         int     eeh_freeze_count;       /* # times this device froze up. */
  77 #endif
  78         int     pci_ext_config_space;   /* for pci devices */
  79         struct  pci_controller *phb;    /* for pci devices */
  80         struct  iommu_table *iommu_table;       /* for phb's or bridges */
  81         struct  pci_dev *pcidev;        /* back-pointer to the pci device */
  82         struct  device_node *node;      /* back-pointer to the device_node */
  83         u32     config_space[16];       /* saved PCI config space */
  84 };
  85
  86 /* Get the pointer to a device_node's pci_dn */
  87 #define PCI_DN(dn)      ((struct pci_dn *) (dn)->data)
  88
  89 struct device_node *fetch_dev_dn(struct pci_dev *dev);
  90
  91 /* Get a device_node from a pci_dev.  This code must be fast except
  92  * in the case where the sysdata is incorrect and needs to be fixed
  93  * up (this will only happen once).
  94  * In this case the sysdata will have been inherited from a PCI host
  95  * bridge or a PCI-PCI bridge further up the tree, so it will point
  96  * to a valid struct pci_dn, just not the one we want.
  97  */
  98 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
  99 {
 100         struct device_node *dn = dev->sysdata;
 101         struct pci_dn *pdn = dn->data;
 102
 103         if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
 104                 return dn;      /* fast path.  sysdata is good */
 105         return fetch_dev_dn(dev);
 106 }
 107
 108 static inline int pci_device_from_OF_node(struct device_node *np,
 109                                           u8 *bus, u8 *devfn)
 110 {
 111         if (!PCI_DN(np))
 112                 return -ENODEV;
 113         *bus = PCI_DN(np)->busno;
 114         *devfn = PCI_DN(np)->devfn;
 115         return 0;
 116 }
 117
 118 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
 119 {
 120         if (bus->self)
 121                 return pci_device_to_OF_node(bus->self);
 122         else
 123                 return bus->sysdata; /* Must be root bus (PHB) */
 124 }
 125
 126 /** Find the bus corresponding to the indicated device node */
 127 struct pci_bus * pcibios_find_pci_bus(struct device_node *dn);
 128
 129 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
 130                                          struct device_node *dev, int primary);
 131
 132 /** Remove all of the PCI devices under this bus */
 133 void pcibios_remove_pci_devices(struct pci_bus *bus);
 134
 135 /** Discover new pci devices under this bus, and add them */
 136 void pcibios_add_pci_devices(struct pci_bus * bus);
 137 void pcibios_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus);
 138
 139 extern int pcibios_remove_root_bus(struct pci_controller *phb);
 140
 141 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
 142 {
 143         struct device_node *busdn = bus->sysdata;
 144
 145         BUG_ON(busdn == NULL);
 146         return PCI_DN(busdn)->phb;
 147 }
 148
 149 extern struct pci_controller*
 150 pci_find_hose_for_OF_device(struct device_node* node);
 151
 152 extern struct pci_controller *
 153 pcibios_alloc_controller(struct device_node *dev);
 154 extern void pcibios_free_controller(struct pci_controller *phb);
 155
 156 #ifdef CONFIG_PCI
 157 extern unsigned long pci_address_to_pio(phys_addr_t address);
 158 #else
 159 static inline unsigned long pci_address_to_pio(phys_addr_t address)
 160 {
 161         return (unsigned long)-1;
 162 }
 163 #endif
 164
 165 /* Return values for ppc_md.pci_probe_mode function */
 166 #define PCI_PROBE_NONE          -1      /* Don't look at this bus at all */
 167 #define PCI_PROBE_NORMAL        0       /* Do normal PCI probing */
 168 #define PCI_PROBE_DEVTREE       1       /* Instantiate from device tree */
 169
 170 #ifdef CONFIG_NUMA
 171 #define PHB_SET_NODE(PHB, NODE)         ((PHB)->node = (NODE))
 172 #else
 173 #define PHB_SET_NODE(PHB, NODE)         ((PHB)->node = -1)
 174 #endif
 175
 176 #endif /* CONFIG_PPC64 */
 177 #endif /* __KERNEL__ */
 178 #endif