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 10 struct pci_dev; 11 #ifdef CONFIG_PCI 12 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ 13 extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max); 14 extern void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long max); 15 extern void __iomem *pci_iomap_range(struct pci_dev *dev, int bar, 16 unsigned long offset, 17 unsigned long maxlen); 18 extern void __iomem *pci_iomap_wc_range(struct pci_dev *dev, int bar, 19 unsigned long offset, 20 unsigned long maxlen); 21 extern 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 26 extern 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) 35 static inline void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max) 36 { 37 return NULL; 38 } 39 40 static inline void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long max) 41 { 42 return NULL; 43 } 44 static 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 } 50 static 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 } 56 static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) 57 { } 58 #endif 59 60 #endif /* __ASM_GENERIC_PCI_IOMAP_H */ 61