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  1. /*
  2.  *      pci.h
  3.  *
  4.  *      PCI defines and function prototypes
  5.  *      Copyright 1994, Drew Eckhardt
  6.  *      Copyright 1997--1999 Martin Mares <mj@ucw.cz>
  7.  *
  8.  *      For more information, please consult the following manuals (look at
  9.  *      http://www.pcisig.com/ for how to get them):
  10.  *
  11.  *      PCI BIOS Specification
  12.  *      PCI Local Bus Specification
  13.  *      PCI to PCI Bridge Specification
  14.  *      PCI System Design Guide
  15.  */
  16.  
  17. #ifndef _UAPILINUX_PCI_H
  18. #define _UAPILINUX_PCI_H
  19.  
  20. #include <linux/pci_regs.h>     /* The pci register defines */
  21.  
  22. /*
  23.  * The PCI interface treats multi-function devices as independent
  24.  * devices.  The slot/function address of each device is encoded
  25.  * in a single byte as follows:
  26.  *
  27.  *      7:3 = slot
  28.  *      2:0 = function
  29.  */
  30. #define PCI_DEVFN(slot, func)   ((((slot) & 0x1f) << 3) | ((func) & 0x07))
  31. #define PCI_SLOT(devfn)         (((devfn) >> 3) & 0x1f)
  32. #define PCI_FUNC(devfn)         ((devfn) & 0x07)
  33.  
  34. /* Ioctls for /proc/bus/pci/X/Y nodes. */
  35. #define PCIIOC_BASE             ('P' << 24 | 'C' << 16 | 'I' << 8)
  36. #define PCIIOC_CONTROLLER       (PCIIOC_BASE | 0x00)    /* Get controller for PCI device. */
  37. #define PCIIOC_MMAP_IS_IO       (PCIIOC_BASE | 0x01)    /* Set mmap state to I/O space. */
  38. #define PCIIOC_MMAP_IS_MEM      (PCIIOC_BASE | 0x02)    /* Set mmap state to MEM space. */
  39. #define PCIIOC_WRITE_COMBINE    (PCIIOC_BASE | 0x03)    /* Enable/disable write-combining. */
  40.  
  41. #endif /* _UAPILINUX_PCI_H */
  42.