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 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 */