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 int roll; /* Roll applied to the GTT entries */ 41 }; 42 43 #define to_gtt_range(x) container_of(x, struct gtt_range, gem) 44 45 extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len, 46 const char *name, int backed, 47 u32 align); 48 extern void psb_gtt_kref_put(struct gtt_range *gt); 49 extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt); 50 extern int psb_gtt_pin(struct gtt_range *gt); 51 extern void psb_gtt_unpin(struct gtt_range *gt); 52 extern void psb_gtt_roll(struct drm_device *dev, 53 struct gtt_range *gt, int roll); 54 extern int psb_gtt_restore(struct drm_device *dev); 55 #endif 56