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 #include <asm/iSeries/HvCallPci.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 unsigned char __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         union HvDsaMap  DsaAddr;        /* Direct Select Address */
  78                                         /* busNumber, subBusNumber, */
  79                                         /* deviceId, barNumber */
  80         int             Irq;            /* Assigned IRQ */
  81         int             Flags;          /* Possible flags(disable/bist)*/
  82         u8              LogicalSlot;    /* Hv Slot Index for Tces */
  83 #endif
  84         u32     config_space[16];       /* saved PCI config space */
  85 };
  86
  87 /* Get the pointer to a device_node's pci_dn */
  88 #define PCI_DN(dn)      ((struct pci_dn *) (dn)->data)
  89
  90 struct device_node *fetch_dev_dn(struct pci_dev *dev);
  91
  92 /* Get a device_node from a pci_dev.  This code must be fast except
  93  * in the case where the sysdata is incorrect and needs to be fixed
  94  * up (this will only happen once).
  95  * In this case the sysdata will have been inherited from a PCI host
  96  * bridge or a PCI-PCI bridge further up the tree, so it will point
  97  * to a valid struct pci_dn, just not the one we want.
  98  */
  99 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
 100 {
 101         struct device_node *dn = dev->sysdata;
 102         struct pci_dn *pdn = dn->data;
 103
 104         if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
 105                 return dn;      /* fast path.  sysdata is good */
 106         return fetch_dev_dn(dev);
 107 }
 108
 109 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
 110 {
 111         if (bus->self)
 112                 return pci_device_to_OF_node(bus->self);
 113         else
 114                 return bus->sysdata; /* Must be root bus (PHB) */
 115 }
 116
 117 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
 118                                          struct device_node *dev);
 119
 120 extern int pcibios_remove_root_bus(struct pci_controller *phb);
 121
 122 extern void phbs_remap_io(void);
 123
 124 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
 125 {
 126         struct device_node *busdn = bus->sysdata;
 127
 128         BUG_ON(busdn == NULL);
 129         return PCI_DN(busdn)->phb;
 130 }
 131
 132 /* Return values for ppc_md.pci_probe_mode function */
 133 #define PCI_PROBE_NONE          -1      /* Don't look at this bus at all */
 134 #define PCI_PROBE_NORMAL        0       /* Do normal PCI probing */
 135 #define PCI_PROBE_DEVTREE       1       /* Instantiate from device tree */
 136
 137 #endif
 138 #endif /* __KERNEL__ */