arch/powerpc/include/asm/pci-bridge.h

   1 #ifndef _ASM_POWERPC_PCI_BRIDGE_H
   2 #define _ASM_POWERPC_PCI_BRIDGE_H
   3 #ifdef __KERNEL__
   4 /*
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version
   8  * 2 of the License, or (at your option) any later version.
   9  */
  10 #include <linux/pci.h>
  11 #include <linux/list.h>
  12 #include <linux/ioport.h>
  13 #include <asm-generic/pci-bridge.h>
  14
  15 struct device_node;
  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 #ifdef CONFIG_PPC64
  24         int node;
  25 #endif
  26         struct device_node *dn;
  27         struct list_head list_node;
  28         struct device *parent;
  29
  30         int first_busno;
  31         int last_busno;
  32         int self_busno;
  33         struct resource busn;
  34
  35         void __iomem *io_base_virt;
  36 #ifdef CONFIG_PPC64
  37         void *io_base_alloc;
  38 #endif
  39         resource_size_t io_base_phys;
  40         resource_size_t pci_io_size;
  41
  42         /* Some machines (PReP) have a non 1:1 mapping of
  43          * the PCI memory space in the CPU bus space
  44          */
  45         resource_size_t pci_mem_offset;
  46
  47         /* Some machines have a special region to forward the ISA
  48          * "memory" cycles such as VGA memory regions. Left to 0
  49          * if unsupported
  50          */
  51         resource_size_t isa_mem_phys;
  52         resource_size_t isa_mem_size;
  53
  54         struct pci_ops *ops;
  55         unsigned int __iomem *cfg_addr;
  56         void __iomem *cfg_data;
  57
  58         /*
  59          * Used for variants of PCI indirect handling and possible quirks:
  60          *  SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1
  61          *  EXT_REG - provides access to PCI-e extended registers
  62          *  SURPRESS_PRIMARY_BUS - we suppress the setting of PCI_PRIMARY_BUS
  63          *   on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
  64          *   to determine which bus number to match on when generating type0
  65          *   config cycles
  66          *  NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
  67          *   hanging if we don't have link and try to do config cycles to
  68          *   anything but the PHB.  Only allow talking to the PHB if this is
  69          *   set.
  70          *  BIG_ENDIAN - cfg_addr is a big endian register
  71          *  BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on
  72          *   the PLB4.  Effectively disable MRM commands by setting this.
  73          */
  74 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE          0x00000001
  75 #define PPC_INDIRECT_TYPE_EXT_REG               0x00000002
  76 #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS  0x00000004
  77 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK          0x00000008
  78 #define PPC_INDIRECT_TYPE_BIG_ENDIAN            0x00000010
  79 #define PPC_INDIRECT_TYPE_BROKEN_MRM            0x00000020
  80         u32 indirect_type;
  81         /* Currently, we limit ourselves to 1 IO range and 3 mem
  82          * ranges since the common pci_bus structure can't handle more
  83          */
  84         struct resource io_resource;
  85         struct resource mem_resources[3];
  86         int global_number;              /* PCI domain number */
  87
  88         resource_size_t dma_window_base_cur;
  89         resource_size_t dma_window_size;
  90
  91 #ifdef CONFIG_PPC64
  92         unsigned long buid;
  93
  94         void *private_data;
  95 #endif  /* CONFIG_PPC64 */
  96 };
  97
  98 /* These are used for config access before all the PCI probing
  99    has been done. */
 100 extern int early_read_config_byte(struct pci_controller *hose, int bus,
 101                         int dev_fn, int where, u8 *val);
 102 extern int early_read_config_word(struct pci_controller *hose, int bus,
 103                         int dev_fn, int where, u16 *val);
 104 extern int early_read_config_dword(struct pci_controller *hose, int bus,
 105                         int dev_fn, int where, u32 *val);
 106 extern int early_write_config_byte(struct pci_controller *hose, int bus,
 107                         int dev_fn, int where, u8 val);
 108 extern int early_write_config_word(struct pci_controller *hose, int bus,
 109                         int dev_fn, int where, u16 val);
 110 extern int early_write_config_dword(struct pci_controller *hose, int bus,
 111                         int dev_fn, int where, u32 val);
 112
 113 extern int early_find_capability(struct pci_controller *hose, int bus,
 114                                  int dev_fn, int cap);
 115
 116 extern void setup_indirect_pci(struct pci_controller* hose,
 117                                resource_size_t cfg_addr,
 118                                resource_size_t cfg_data, u32 flags);
 119
 120 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
 121 {
 122         return bus->sysdata;
 123 }
 124
 125 #ifndef CONFIG_PPC64
 126
 127 extern int pci_device_from_OF_node(struct device_node *node,
 128                                    u8 *bus, u8 *devfn);
 129 extern void pci_create_OF_bus_map(void);
 130
 131 static inline int isa_vaddr_is_ioport(void __iomem *address)
 132 {
 133         /* No specific ISA handling on ppc32 at this stage, it
 134          * all goes through PCI
 135          */
 136         return 0;
 137 }
 138
 139 #else   /* CONFIG_PPC64 */
 140
 141 /*
 142  * PCI stuff, for nodes representing PCI devices, pointed to
 143  * by device_node->data.
 144  */
 145 struct iommu_table;
 146
 147 struct pci_dn {
 148         int     busno;                  /* pci bus number */
 149         int     devfn;                  /* pci device and function number */
 150
 151         struct  pci_controller *phb;    /* for pci devices */
 152         struct  iommu_table *iommu_table;       /* for phb's or bridges */
 153         struct  device_node *node;      /* back-pointer to the device_node */
 154
 155         int     pci_ext_config_space;   /* for pci devices */
 156
 157         struct  pci_dev *pcidev;        /* back-pointer to the pci device */
 158 #ifdef CONFIG_EEH
 159         struct eeh_dev *edev;           /* eeh device */
 160 #endif
 161 #define IODA_INVALID_PE         (-1)
 162 #ifdef CONFIG_PPC_POWERNV
 163         int     pe_number;
 164 #endif
 165 };
 166
 167 /* Get the pointer to a device_node's pci_dn */
 168 #define PCI_DN(dn)      ((struct pci_dn *) (dn)->data)
 169
 170 extern void * update_dn_pci_info(struct device_node *dn, void *data);
 171
 172 static inline int pci_device_from_OF_node(struct device_node *np,
 173                                           u8 *bus, u8 *devfn)
 174 {
 175         if (!PCI_DN(np))
 176                 return -ENODEV;
 177         *bus = PCI_DN(np)->busno;
 178         *devfn = PCI_DN(np)->devfn;
 179         return 0;
 180 }
 181
 182 #if defined(CONFIG_EEH)
 183 static inline struct eeh_dev *of_node_to_eeh_dev(struct device_node *dn)
 184 {
 185         /*
 186          * For those OF nodes whose parent isn't PCI bridge, they
 187          * don't have PCI_DN actually. So we have to skip them for
 188          * any EEH operations.
 189          */
 190         if (!dn || !PCI_DN(dn))
 191                 return NULL;
 192
 193         return PCI_DN(dn)->edev;
 194 }
 195 #endif
 196
 197 /** Find the bus corresponding to the indicated device node */
 198 extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn);
 199
 200 /** Remove all of the PCI devices under this bus */
 201 extern void pcibios_remove_pci_devices(struct pci_bus *bus);
 202
 203 /** Discover new pci devices under this bus, and add them */
 204 extern void pcibios_add_pci_devices(struct pci_bus *bus);
 205
 206
 207 extern void isa_bridge_find_early(struct pci_controller *hose);
 208
 209 static inline int isa_vaddr_is_ioport(void __iomem *address)
 210 {
 211         /* Check if address hits the reserved legacy IO range */
 212         unsigned long ea = (unsigned long)address;
 213         return ea >= ISA_IO_BASE && ea < ISA_IO_END;
 214 }
 215
 216 extern int pcibios_unmap_io_space(struct pci_bus *bus);
 217 extern int pcibios_map_io_space(struct pci_bus *bus);
 218
 219 #ifdef CONFIG_NUMA
 220 #define PHB_SET_NODE(PHB, NODE)         ((PHB)->node = (NODE))
 221 #else
 222 #define PHB_SET_NODE(PHB, NODE)         ((PHB)->node = -1)
 223 #endif
 224
 225 #endif  /* CONFIG_PPC64 */
 226
 227 /* Get the PCI host controller for an OF device */
 228 extern struct pci_controller *pci_find_hose_for_OF_device(
 229                         struct device_node* node);
 230
 231 /* Fill up host controller resources from the OF node */
 232 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
 233                         struct device_node *dev, int primary);
 234
 235 /* Allocate & free a PCI host bridge structure */
 236 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev);
 237 extern void pcibios_free_controller(struct pci_controller *phb);
 238
 239 #ifdef CONFIG_PCI
 240 extern int pcibios_vaddr_is_ioport(void __iomem *address);
 241 #else
 242 static inline int pcibios_vaddr_is_ioport(void __iomem *address)
 243 {
 244         return 0;
 245 }
 246 #endif  /* CONFIG_PCI */
 247
 248 #endif  /* __KERNEL__ */
 249 #endif  /* _ASM_POWERPC_PCI_BRIDGE_H */