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/drmP.h> 12 #include <drm/drm_gem.h> 13 14 /* This wants cleaning up with respect to the psb_dev and un-needed stuff */ 15 struct psb_gtt { 16 uint32_t gatt_start; 17 uint32_t mmu_gatt_start; 18 uint32_t gtt_start; 19 uint32_t gtt_phys_start; 20 unsigned gtt_pages; 21 unsigned gatt_pages; 22 unsigned long stolen_size; 23 unsigned long vram_stolen_size; 24 struct rw_semaphore sem; 25 }; 26 27 /* Exported functions */ 28 extern int psb_gtt_init(struct drm_device *dev, int resume); 29 extern void psb_gtt_takedown(struct drm_device *dev); 30 31 /* Each gtt_range describes an allocation in the GTT area */ 32 struct gtt_range { 33 struct resource resource; /* Resource for our allocation */ 34 u32 offset; /* GTT offset of our object */ 35 struct drm_gem_object gem; /* GEM high level stuff */ 36 int in_gart; /* Currently in the GART (ref ct) */ 37 bool stolen; /* Backed from stolen RAM */ 38 bool mmapping; /* Is mmappable */ 39 struct page **pages; /* Backing pages if present */ 40 int npage; /* Number of backing pages */ 41 int roll; /* Roll applied to the GTT entries */ 42 }; 43 44 #define to_gtt_range(x) container_of(x, struct gtt_range, gem) 45 46 extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len, 47 const char *name, int backed, 48 u32 align); 49 extern void psb_gtt_kref_put(struct gtt_range *gt); 50 extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt); 51 extern int psb_gtt_pin(struct gtt_range *gt); 52 extern void psb_gtt_unpin(struct gtt_range *gt); 53 extern void psb_gtt_roll(struct drm_device *dev, 54 struct gtt_range *gt, int roll); 55 extern int psb_gtt_restore(struct drm_device *dev); 56 #endif 57