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 */
43