include/asm-generic/pci_iomap.h

0001 /* SPDX-License-Identifier: GPL-2.0+ */
0002 /* Generic I/O port emulation.
0003  *
0004  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
0005  * Written by David Howells (dhowells@redhat.com)
0006  */
0007 #ifndef __ASM_GENERIC_PCI_IOMAP_H
0008 #define __ASM_GENERIC_PCI_IOMAP_H
0009
0010 struct pci_dev;
0011 #ifdef CONFIG_PCI
0012 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
0013 extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
0014 extern void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long max);
0015 extern void __iomem *pci_iomap_range(struct pci_dev *dev, int bar,
0016                      unsigned long offset,
0017                      unsigned long maxlen);
0018 extern void __iomem *pci_iomap_wc_range(struct pci_dev *dev, int bar,
0019                     unsigned long offset,
0020                     unsigned long maxlen);
0021 extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
0022 /* Create a virtual mapping cookie for a port on a given PCI device.
0023  * Do not call this directly, it exists to make it easier for architectures
0024  * to override */
0025 #ifdef CONFIG_NO_GENERIC_PCI_IOPORT_MAP
0026 extern void __iomem *__pci_ioport_map(struct pci_dev *dev, unsigned long port,
0027                       unsigned int nr);
0028 #elif !defined(CONFIG_HAS_IOPORT_MAP)
0029 #define __pci_ioport_map(dev, port, nr) NULL
0030 #else
0031 #define __pci_ioport_map(dev, port, nr) ioport_map((port), (nr))
0032 #endif
0033
0034 #elif defined(CONFIG_GENERIC_PCI_IOMAP)
0035 static inline void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
0036 {
0037     return NULL;
0038 }
0039
0040 static inline void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long max)
0041 {
0042     return NULL;
0043 }
0044 static inline void __iomem *pci_iomap_range(struct pci_dev *dev, int bar,
0045                         unsigned long offset,
0046                         unsigned long maxlen)
0047 {
0048     return NULL;
0049 }
0050 static inline void __iomem *pci_iomap_wc_range(struct pci_dev *dev, int bar,
0051                            unsigned long offset,
0052                            unsigned long maxlen)
0053 {
0054     return NULL;
0055 }
0056 static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
0057 { }
0058 #endif
0059
0060 #endif /* __ASM_GENERIC_PCI_IOMAP_H */