drivers/gpu/drm/gma500/gtt.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /**************************************************************************
   3  * Copyright (c) 2007-2008, Intel Corporation.
   4  * All Rights Reserved.
   5  *
   6  **************************************************************************/
   7
   8 #ifndef _PSB_GTT_H_
   9 #define _PSB_GTT_H_
  10
  11 #include <drm/drm_gem.h>
  12
  13 /* This wants cleaning up with respect to the psb_dev and un-needed stuff */
  14 struct psb_gtt {
  15         uint32_t gatt_start;
  16         uint32_t mmu_gatt_start;
  17         uint32_t gtt_start;
  18         uint32_t gtt_phys_start;
  19         unsigned gtt_pages;
  20         unsigned gatt_pages;
  21         unsigned long stolen_size;
  22         unsigned long vram_stolen_size;
  23         struct rw_semaphore sem;
  24 };
  25
  26 /* Exported functions */
  27 extern int psb_gtt_init(struct drm_device *dev, int resume);
  28 extern void psb_gtt_takedown(struct drm_device *dev);
  29
  30 /* Each gtt_range describes an allocation in the GTT area */
  31 struct gtt_range {
  32         struct resource resource;       /* Resource for our allocation */
  33         u32 offset;                     /* GTT offset of our object */
  34         struct drm_gem_object gem;      /* GEM high level stuff */
  35         int in_gart;                    /* Currently in the GART (ref ct) */
  36         bool stolen;                    /* Backed from stolen RAM */
  37         bool mmapping;                  /* Is mmappable */
  38         struct page **pages;            /* Backing pages if present */
  39         int npage;                      /* Number of backing pages */
  40 };
  41
  42 #define to_gtt_range(x) container_of(x, struct gtt_range, gem)
  43
  44 extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len,
  45                                              const char *name, int backed,
  46                                              u32 align);
  47 extern void psb_gtt_kref_put(struct gtt_range *gt);
  48 extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt);
  49 extern int psb_gtt_pin(struct gtt_range *gt);
  50 extern void psb_gtt_unpin(struct gtt_range *gt);
  51 extern int psb_gtt_restore(struct drm_device *dev);
  52 #endif