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                                         const char *name);
  18
  19 int __aperture_remove_legacy_vga_devices(struct pci_dev *pdev);
  20
  21 int aperture_remove_conflicting_pci_devices(struct pci_dev *pdev, const char *name);
  22 #else
  23 static inline int devm_aperture_acquire_for_platform_device(struct platform_device *pdev,
  24                                                             resource_size_t base,
  25                                                             resource_size_t size)
  26 {
  27         return 0;
  28 }
  29
  30 static inline int aperture_remove_conflicting_devices(resource_size_t base, resource_size_t size,
  31                                                       const char *name)
  32 {
  33         return 0;
  34 }
  35
  36 static inline int __aperture_remove_legacy_vga_devices(struct pci_dev *pdev)
  37 {
  38         return 0;
  39 }
  40
  41 static inline int aperture_remove_conflicting_pci_devices(struct pci_dev *pdev, const char *name)
  42 {
  43         return 0;
  44 }
  45 #endif
  46
  47 /**
  48  * aperture_remove_all_conflicting_devices - remove all existing framebuffers
  49  * @name: a descriptive name of the requesting driver
  50  *
  51  * This function removes all graphics device drivers. Use this function on systems
  52  * that can have their framebuffer located anywhere in memory.
  53  *
  54  * Returns:
  55  * 0 on success, or a negative errno code otherwise
  56  */
  57 static inline int aperture_remove_all_conflicting_devices(const char *name)
  58 {
  59         return aperture_remove_conflicting_devices(0, (resource_size_t)-1, name);
  60 }
  61
  62 #endif