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 #else 29 #define __pci_ioport_map(dev, port, nr) ioport_map((port), (nr)) 30 #endif 31 32 #elif defined(CONFIG_GENERIC_PCI_IOMAP) 33 static inline void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max) 34 { 35 return NULL; 36 } 37 38 static inline void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long max) 39 { 40 return NULL; 41 } 42 static inline void __iomem *pci_iomap_range(struct pci_dev *dev, int bar, 43 unsigned long offset, 44 unsigned long maxlen) 45 { 46 return NULL; 47 } 48 static inline void __iomem *pci_iomap_wc_range(struct pci_dev *dev, int bar, 49 unsigned long offset, 50 unsigned long maxlen) 51 { 52 return NULL; 53 } 54 static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) 55 { } 56 #endif 57 58 #endif /* __ASM_GENERIC_PCI_IOMAP_H */ 59