1/* SPDX-License-Identifier: GPL-2.0+ */ 2/* Generic I/O port emulation. 3 * 4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7#ifndef __ASM_GENERIC_PCI_IOMAP_H 8#define __ASM_GENERIC_PCI_IOMAP_H 9 10struct pci_dev; 11#ifdef CONFIG_PCI 12/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ 13extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max); 14extern void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long max); 15extern void __iomem *pci_iomap_range(struct pci_dev *dev, int bar, 16 unsigned long offset, 17 unsigned long maxlen); 18extern void __iomem *pci_iomap_wc_range(struct pci_dev *dev, int bar, 19 unsigned long offset, 20 unsigned long maxlen); 21extern void pci_iounmap(struct pci_dev *dev, void __iomem *); 22/* Create a virtual mapping cookie for a port on a given PCI device. 23 * Do not call this directly, it exists to make it easier for architectures 24 * to override */ 25#ifdef CONFIG_NO_GENERIC_PCI_IOPORT_MAP 26extern void __iomem *__pci_ioport_map(struct pci_dev *dev, unsigned long port, 27 unsigned int nr); 28#elif !defined(CONFIG_HAS_IOPORT_MAP) 29#define __pci_ioport_map(dev, port, nr) NULL 30#else 31#define __pci_ioport_map(dev, port, nr) ioport_map((port), (nr)) 32#endif 33 34#elif defined(CONFIG_GENERIC_PCI_IOMAP) 35static inline void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max) 36{ 37 return NULL; 38} 39 40static inline void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long max) 41{ 42 return NULL; 43} 44static inline void __iomem *pci_iomap_range(struct pci_dev *dev, int bar, 45 unsigned long offset, 46 unsigned long maxlen) 47{ 48 return NULL; 49} 50static inline void __iomem *pci_iomap_wc_range(struct pci_dev *dev, int bar, 51 unsigned long offset, 52 unsigned long maxlen) 53{ 54 return NULL; 55} 56static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) 57{ } 58#endif 59 60#endif /* __ASM_GENERIC_PCI_IOMAP_H */ 61