The C and C++ Include Header Files

/usr/include/linux/pci.h


$ cat -n /usr/include/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 LINUX_PCI_H
    19	#define LINUX_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 /* LINUX_PCI_H */