include/uapi/linux/pci.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  *      pci.h
   4  *
   5  *      PCI defines and function prototypes
   6  *      Copyright 1994, Drew Eckhardt
   7  *      Copyright 1997--1999 Martin Mares <mj@ucw.cz>
   8  *
   9  *      For more information, please consult the following manuals (look at
  10  *      http://www.pcisig.com/ for how to get them):
  11  *
  12  *      PCI BIOS Specification
  13  *      PCI Local Bus Specification
  14  *      PCI to PCI Bridge Specification
  15  *      PCI System Design Guide
  16  */
  17
  18 #ifndef _UAPILINUX_PCI_H
  19 #define _UAPILINUX_PCI_H
  20
  21 #include <linux/pci_regs.h>     /* The pci register defines */
  22
  23 /*
  24  * The PCI interface treats multi-function devices as independent
  25  * devices.  The slot/function address of each device is encoded
  26  * in a single byte as follows:
  27  *
  28  *      7:3 = slot
  29  *      2:0 = function
  30  */
  31 #define PCI_DEVFN(slot, func)   ((((slot) & 0x1f) << 3) | ((func) & 0x07))
  32 #define PCI_SLOT(devfn)         (((devfn) >> 3) & 0x1f)
  33 #define PCI_FUNC(devfn)         ((devfn) & 0x07)
  34
  35 /* Ioctls for /proc/bus/pci/X/Y nodes. */
  36 #define PCIIOC_BASE             ('P' << 24 | 'C' << 16 | 'I' << 8)
  37 #define PCIIOC_CONTROLLER       (PCIIOC_BASE | 0x00)    /* Get controller for PCI device. */
  38 #define PCIIOC_MMAP_IS_IO       (PCIIOC_BASE | 0x01)    /* Set mmap state to I/O space. */
  39 #define PCIIOC_MMAP_IS_MEM      (PCIIOC_BASE | 0x02)    /* Set mmap state to MEM space. */
  40 #define PCIIOC_WRITE_COMBINE    (PCIIOC_BASE | 0x03)    /* Enable/disable write-combining. */
  41
  42 #endif /* _UAPILINUX_PCI_H */