arch/mips/include/asm/pci.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  */
   6 #ifndef _ASM_PCI_H
   7 #define _ASM_PCI_H
   8
   9 #include <linux/mm.h>
  10
  11 #ifdef __KERNEL__
  12
  13 /*
  14  * This file essentially defines the interface between board
  15  * specific PCI code and MIPS common PCI code.  Should potentially put
  16  * into include/asm/pci.h file.
  17  */
  18
  19 #include <linux/ioport.h>
  20 #include <linux/list.h>
  21 #include <linux/of.h>
  22
  23 #ifdef CONFIG_PCI_DRIVERS_LEGACY
  24
  25 /*
  26  * Each PCI channel is a top-level PCI bus seem by CPU.  A machine with
  27  * multiple PCI channels may have multiple PCI host controllers or a
  28  * single controller supporting multiple channels.
  29  */
  30 struct pci_controller {
  31         struct list_head list;
  32         struct pci_bus *bus;
  33         struct device_node *of_node;
  34
  35         struct pci_ops *pci_ops;
  36         struct resource *mem_resource;
  37         unsigned long mem_offset;
  38         struct resource *io_resource;
  39         unsigned long io_offset;
  40         unsigned long io_map_base;
  41
  42 #ifndef CONFIG_PCI_DOMAINS_GENERIC
  43         unsigned int index;
  44         /* For compatibility with current (as of July 2003) pciutils
  45            and XFree86. Eventually will be removed. */
  46         unsigned int need_domain_info;
  47 #endif
  48
  49         /* Optional access methods for reading/writing the bus number
  50            of the PCI controller */
  51         int (*get_busno)(void);
  52         void (*set_busno)(int busno);
  53 };
  54
  55 /*
  56  * Used by boards to register their PCI busses before the actual scanning.
  57  */
  58 extern void register_pci_controller(struct pci_controller *hose);
  59
  60 /*
  61  * board supplied pci irq fixup routine
  62  */
  63 extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
  64
  65 /* Do platform specific device initialization at pci_enable_device() time */
  66 extern int pcibios_plat_dev_init(struct pci_dev *dev);
  67
  68 extern char * (*pcibios_plat_setup)(char *str);
  69
  70 #ifdef CONFIG_OF
  71 /* this function parses memory ranges from a device node */
  72 extern void pci_load_of_ranges(struct pci_controller *hose,
  73                                struct device_node *node);
  74 #else
  75 static inline void pci_load_of_ranges(struct pci_controller *hose,
  76                                       struct device_node *node) {}
  77 #endif
  78
  79 #ifdef CONFIG_PCI_DOMAINS_GENERIC
  80 static inline void set_pci_need_domain_info(struct pci_controller *hose,
  81                                             int need_domain_info)
  82 {
  83         /* nothing to do */
  84 }
  85 #elif defined(CONFIG_PCI_DOMAINS)
  86 static inline void set_pci_need_domain_info(struct pci_controller *hose,
  87                                             int need_domain_info)
  88 {
  89         hose->need_domain_info = need_domain_info;
  90 }
  91 #endif /* CONFIG_PCI_DOMAINS */
  92
  93 #endif
  94
  95 /* Can be used to override the logic in pci_scan_bus for skipping
  96    already-configured bus numbers - to be used for buggy BIOSes
  97    or architectures with incomplete PCI setup by the loader */
  98 static inline unsigned int pcibios_assign_all_busses(void)
  99 {
 100         return 1;
 101 }
 102
 103 extern unsigned long PCIBIOS_MIN_IO;
 104 extern unsigned long PCIBIOS_MIN_MEM;
 105
 106 #define PCIBIOS_MIN_CARDBUS_IO  0x4000
 107
 108 #define HAVE_PCI_MMAP
 109 #define ARCH_GENERIC_PCI_MMAP_RESOURCE
 110
 111 /*
 112  * Dynamic DMA mapping stuff.
 113  * MIPS has everything mapped statically.
 114  */
 115
 116 #include <linux/types.h>
 117 #include <linux/slab.h>
 118 #include <linux/scatterlist.h>
 119 #include <linux/string.h>
 120 #include <asm/io.h>
 121
 122 #ifdef CONFIG_PCI_DOMAINS_GENERIC
 123 static inline int pci_proc_domain(struct pci_bus *bus)
 124 {
 125         return pci_domain_nr(bus);
 126 }
 127 #elif defined(CONFIG_PCI_DOMAINS)
 128 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
 129
 130 static inline int pci_proc_domain(struct pci_bus *bus)
 131 {
 132         struct pci_controller *hose = bus->sysdata;
 133         return hose->need_domain_info;
 134 }
 135 #endif /* CONFIG_PCI_DOMAINS */
 136
 137 #endif /* __KERNEL__ */
 138
 139 /* Do platform specific device initialization at pci_enable_device() time */
 140 extern int pcibios_plat_dev_init(struct pci_dev *dev);
 141
 142 #endif /* _ASM_PCI_H */