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