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 #include <asm/iSeries/HvCallPci.h>
  10
  11 /*
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version
  15  * 2 of the License, or (at your option) any later version.
  16  */
  17
  18 /*
  19  * Structure of a PCI controller (host bridge)
  20  */
  21 struct pci_controller {
  22         struct pci_bus *bus;
  23         char is_dynamic;
  24         void *arch_data;
  25         struct list_head list_node;
  26
  27         int first_busno;
  28         int last_busno;
  29
  30         void __iomem *io_base_virt;
  31         unsigned long io_base_phys;
  32
  33         /* Some machines have a non 1:1 mapping of
  34          * the PCI memory space in the CPU bus space
  35          */
  36         unsigned long pci_mem_offset;
  37         unsigned long pci_io_size;
  38
  39         struct pci_ops *ops;
  40         volatile unsigned int __iomem *cfg_addr;
  41         volatile unsigned char __iomem *cfg_data;
  42
  43         /* Currently, we limit ourselves to 1 IO range and 3 mem
  44          * ranges since the common pci_bus structure can't handle more
  45          */
  46         struct resource io_resource;
  47         struct resource mem_resources[3];
  48         int global_number;
  49         int local_number;
  50         unsigned long buid;
  51         unsigned long dma_window_base_cur;
  52         unsigned long dma_window_size;
  53 };
  54
  55 /*
  56  * PCI stuff, for nodes representing PCI devices, pointed to
  57  * by device_node->data.
  58  */
  59 struct pci_controller;
  60 struct iommu_table;
  61
  62 struct pci_dn {
  63         int     busno;                  /* for pci devices */
  64         int     bussubno;               /* for pci devices */
  65         int     devfn;                  /* for pci devices */
  66         int     eeh_mode;               /* See eeh.h for possible EEH_MODEs */
  67         int     eeh_config_addr;
  68         int     eeh_capable;            /* from firmware */
  69         int     eeh_check_count;        /* # times driver ignored error */
  70         int     eeh_freeze_count;       /* # times this device froze up. */
  71         int     eeh_is_bridge;          /* device is pci-to-pci bridge */
  72
  73         int     pci_ext_config_space;   /* for pci devices */
  74         struct  pci_controller *phb;    /* for pci devices */
  75         struct  iommu_table *iommu_table;       /* for phb's or bridges */
  76         struct  pci_dev *pcidev;        /* back-pointer to the pci device */
  77         struct  device_node *node;      /* back-pointer to the device_node */
  78 #ifdef CONFIG_PPC_ISERIES
  79         struct  list_head Device_List;
  80         union HvDsaMap  DsaAddr;        /* Direct Select Address */
  81                                         /* busNumber, subBusNumber, */
  82                                         /* deviceId, barNumber */
  83         int             Irq;            /* Assigned IRQ */
  84         int             Flags;          /* Possible flags(disable/bist)*/
  85         u8              LogicalSlot;    /* Hv Slot Index for Tces */
  86 #endif
  87         u32     config_space[16];       /* saved PCI config space */
  88 };
  89
  90 /* Get the pointer to a device_node's pci_dn */
  91 #define PCI_DN(dn)      ((struct pci_dn *) (dn)->data)
  92
  93 struct device_node *fetch_dev_dn(struct pci_dev *dev);
  94
  95 /* Get a device_node from a pci_dev.  This code must be fast except
  96  * in the case where the sysdata is incorrect and needs to be fixed
  97  * up (this will only happen once).
  98  * In this case the sysdata will have been inherited from a PCI host
  99  * bridge or a PCI-PCI bridge further up the tree, so it will point
 100  * to a valid struct pci_dn, just not the one we want.
 101  */
 102 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
 103 {
 104         struct device_node *dn = dev->sysdata;
 105         struct pci_dn *pdn = dn->data;
 106
 107         if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
 108                 return dn;      /* fast path.  sysdata is good */
 109         return fetch_dev_dn(dev);
 110 }
 111
 112 static inline int pci_device_from_OF_node(struct device_node *np,
 113                                           u8 *bus, u8 *devfn)
 114 {
 115         if (!PCI_DN(np))
 116                 return -ENODEV;
 117         *bus = PCI_DN(np)->busno;
 118         *devfn = PCI_DN(np)->devfn;
 119         return 0;
 120 }
 121
 122 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
 123 {
 124         if (bus->self)
 125                 return pci_device_to_OF_node(bus->self);
 126         else
 127                 return bus->sysdata; /* Must be root bus (PHB) */
 128 }
 129
 130 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
 131                                          struct device_node *dev);
 132
 133 extern int pcibios_remove_root_bus(struct pci_controller *phb);
 134
 135 extern void phbs_remap_io(void);
 136
 137 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
 138 {
 139         struct device_node *busdn = bus->sysdata;
 140
 141         BUG_ON(busdn == NULL);
 142         return PCI_DN(busdn)->phb;
 143 }
 144
 145 /* Return values for ppc_md.pci_probe_mode function */
 146 #define PCI_PROBE_NONE          -1      /* Don't look at this bus at all */
 147 #define PCI_PROBE_NORMAL        0       /* Do normal PCI probing */
 148 #define PCI_PROBE_DEVTREE       1       /* Instantiate from device tree */
 149
 150 #endif
 151 #endif /* __KERNEL__ */