/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

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/*

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* pci.h

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*

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* PCI defines and function prototypes

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* Copyright 1994, Drew Eckhardt

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* Copyright 1997--1999 Martin Mares <mj@ucw.cz>

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*

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* For more information, please consult the following manuals (look at

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* http://www.pcisig.com/ for how to get them):

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*

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* PCI BIOS Specification

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* PCI Local Bus Specification

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* PCI to PCI Bridge Specification

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* PCI System Design Guide

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*/

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#ifndef LINUX_PCI_H

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#define LINUX_PCI_H

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#include <linux/pci_regs.h> /* The pci register defines */

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/*

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* The PCI interface treats multi-function devices as independent

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* devices. The slot/function address of each device is encoded

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* in a single byte as follows:

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*

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* 7:3 = slot

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* 2:0 = function

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*/

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#define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))

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#define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)

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#define PCI_FUNC(devfn) ((devfn) & 0x07)

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/* Ioctls for /proc/bus/pci/X/Y nodes. */

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#define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)

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#define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00) /* Get controller for PCI device. */

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#define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01) /* Set mmap state to I/O space. */

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#define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02) /* Set mmap state to MEM space. */

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#define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03) /* Enable/disable write-combining. */

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#endif /* LINUX_PCI_H */

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