include/linux/aperture.h

   1 /* SPDX-License-Identifier: MIT */
   2
   3 #ifndef _LINUX_APERTURE_H_
   4 #define _LINUX_APERTURE_H_
   5
   6 #include <linux/types.h>
   7
   8 struct pci_dev;
   9 struct platform_device;
  10
  11 #if defined(CONFIG_APERTURE_HELPERS)
  12 int devm_aperture_acquire_for_platform_device(struct platform_device *pdev,
  13                                               resource_size_t base,
  14                                               resource_size_t size);
  15
  16 int aperture_remove_conflicting_devices(resource_size_t base, resource_size_t size,
  17                                         bool primary, const char *name);
  18
  19 int aperture_remove_conflicting_pci_devices(struct pci_dev *pdev, const char *name);
  20 #else
  21 static inline int devm_aperture_acquire_for_platform_device(struct platform_device *pdev,
  22                                                             resource_size_t base,
  23                                                             resource_size_t size)
  24 {
  25         return 0;
  26 }
  27
  28 static inline int aperture_remove_conflicting_devices(resource_size_t base, resource_size_t size,
  29                                                       bool primary, const char *name)
  30 {
  31         return 0;
  32 }
  33
  34 static inline int aperture_remove_conflicting_pci_devices(struct pci_dev *pdev, const char *name)
  35 {
  36         return 0;
  37 }
  38 #endif
  39
  40 /**
  41  * aperture_remove_all_conflicting_devices - remove all existing framebuffers
  42  * @primary: also kick vga16fb if present; only relevant for VGA devices
  43  * @name: a descriptive name of the requesting driver
  44  *
  45  * This function removes all graphics device drivers. Use this function on systems
  46  * that can have their framebuffer located anywhere in memory.
  47  *
  48  * Returns:
  49  * 0 on success, or a negative errno code otherwise
  50  */
  51 static inline int aperture_remove_all_conflicting_devices(bool primary, const char *name)
  52 {
  53         return aperture_remove_conflicting_devices(0, (resource_size_t)-1, primary, name);
  54 }
  55
  56 #endif