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 #include <linux/list.h>
   7
   8 #include <asm/iSeries/HvCallPci.h>
   9
  10 /*
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version
  14  * 2 of the License, or (at your option) any later version.
  15  */
  16
  17 /*
  18  * Structure of a PCI controller (host bridge)
  19  */
  20 struct pci_controller {
  21         struct pci_bus *bus;
  22         char is_dynamic;
  23         void *arch_data;
  24         struct list_head list_node;
  25
  26         int first_busno;
  27         int last_busno;
  28
  29         void __iomem *io_base_virt;
  30         unsigned long io_base_phys;
  31
  32         /* Some machines have a non 1:1 mapping of
  33          * the PCI memory space in the CPU bus space
  34          */
  35         unsigned long pci_mem_offset;
  36         unsigned long pci_io_size;
  37
  38         struct pci_ops *ops;
  39         volatile unsigned int __iomem *cfg_addr;
  40         volatile unsigned char __iomem *cfg_data;
  41
  42         /* Currently, we limit ourselves to 1 IO range and 3 mem
  43          * ranges since the common pci_bus structure can't handle more
  44          */
  45         struct resource io_resource;
  46         struct resource mem_resources[3];
  47         int global_number;
  48         int local_number;
  49         unsigned long buid;
  50         unsigned long dma_window_base_cur;
  51         unsigned long dma_window_size;
  52 };
  53
  54 /*
  55  * PCI stuff, for nodes representing PCI devices, pointed to
  56  * by device_node->data.
  57  */
  58 struct pci_controller;
  59 struct iommu_table;
  60
  61 struct pci_dn {
  62         int     busno;                  /* for pci devices */
  63         int     bussubno;               /* for pci devices */
  64         int     devfn;                  /* for pci devices */
  65         int     eeh_mode;               /* See eeh.h for possible EEH_MODEs */
  66         int     eeh_config_addr;
  67         int     eeh_capable;            /* from firmware */
  68         int     eeh_check_count;        /* # times driver ignored error */
  69         int     eeh_freeze_count;       /* # times this device froze up. */
  70         int     eeh_is_bridge;          /* device is pci-to-pci bridge */
  71
  72         int     pci_ext_config_space;   /* for pci devices */
  73         struct  pci_controller *phb;    /* for pci devices */
  74         struct  iommu_table *iommu_table;       /* for phb's or bridges */
  75         struct  pci_dev *pcidev;        /* back-pointer to the pci device */
  76         struct  device_node *node;      /* back-pointer to the device_node */
  77 #ifdef CONFIG_PPC_ISERIES
  78         struct  list_head Device_List;
  79         union HvDsaMap  DsaAddr;        /* Direct Select Address */
  80                                         /* busNumber, subBusNumber, */
  81                                         /* deviceId, barNumber */
  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 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
 130                                          struct device_node *dev);
 131
 132 extern int pcibios_remove_root_bus(struct pci_controller *phb);
 133
 134 extern void phbs_remap_io(void);
 135
 136 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
 137 {
 138         struct device_node *busdn = bus->sysdata;
 139
 140         BUG_ON(busdn == NULL);
 141         return PCI_DN(busdn)->phb;
 142 }
 143
 144 /* Return values for ppc_md.pci_probe_mode function */
 145 #define PCI_PROBE_NONE          -1      /* Don't look at this bus at all */
 146 #define PCI_PROBE_NORMAL        0       /* Do normal PCI probing */
 147 #define PCI_PROBE_DEVTREE       1       /* Instantiate from device tree */
 148
 149 #endif
 150 #endif /* __KERNEL__ */