include/asm-generic/pci_iomap.h

   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 /* Create a virtual mapping cookie for a port on a given PCI device.
  22  * Do not call this directly, it exists to make it easier for architectures
  23  * to override */
  24 #ifdef CONFIG_NO_GENERIC_PCI_IOPORT_MAP
  25 extern void __iomem *__pci_ioport_map(struct pci_dev *dev, unsigned long port,
  26                                       unsigned int nr);
  27 #else
  28 #define __pci_ioport_map(dev, port, nr) ioport_map((port), (nr))
  29 #endif
  30
  31 #elif defined(CONFIG_GENERIC_PCI_IOMAP)
  32 static inline void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
  33 {
  34         return NULL;
  35 }
  36
  37 static inline void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long max)
  38 {
  39         return NULL;
  40 }
  41 static inline void __iomem *pci_iomap_range(struct pci_dev *dev, int bar,
  42                                             unsigned long offset,
  43                                             unsigned long maxlen)
  44 {
  45         return NULL;
  46 }
  47 static inline void __iomem *pci_iomap_wc_range(struct pci_dev *dev, int bar,
  48                                                unsigned long offset,
  49                                                unsigned long maxlen)
  50 {
  51         return NULL;
  52 }
  53 #endif
  54
  55 #endif /* __ASM_GENERIC_IO_H */