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