include/drm/drm_aperture.h

   1 /* SPDX-License-Identifier: MIT */
   2
   3 #ifndef _DRM_APERTURE_H_
   4 #define _DRM_APERTURE_H_
   5
   6 #include <linux/types.h>
   7
   8 struct drm_device;
   9 struct drm_driver;
  10 struct pci_dev;
  11
  12 int devm_aperture_acquire_from_firmware(struct drm_device *dev, resource_size_t base,
  13                                         resource_size_t size);
  14
  15 int drm_aperture_remove_conflicting_framebuffers(resource_size_t base, resource_size_t size,
  16                                                  const struct drm_driver *req_driver);
  17
  18 int drm_aperture_remove_conflicting_pci_framebuffers(struct pci_dev *pdev,
  19                                                      const struct drm_driver *req_driver);
  20
  21 /**
  22  * drm_aperture_remove_framebuffers - remove all existing framebuffers
  23  * @req_driver: requesting DRM driver
  24  *
  25  * This function removes all graphics device drivers. Use this function on systems
  26  * that can have their framebuffer located anywhere in memory.
  27  *
  28  * Returns:
  29  * 0 on success, or a negative errno code otherwise
  30  */
  31 static inline int
  32 drm_aperture_remove_framebuffers(const struct drm_driver *req_driver)
  33 {
  34         return drm_aperture_remove_conflicting_framebuffers(0, (resource_size_t)-1,
  35                                                             req_driver);
  36 }
  37
  38 #endif