1 /************************************************************************** 2 * Copyright (c) 2007-2008, Intel Corporation. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program; if not, write to the Free Software Foundation, Inc., 16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 **************************************************************************/ 19 20 #ifndef _PSB_GTT_H_ 21 #define _PSB_GTT_H_ 22 23 #include <drm/drmP.h> 24 #include <drm/drm_gem.h> 25 26 /* This wants cleaning up with respect to the psb_dev and un-needed stuff */ 27 struct psb_gtt { 28 uint32_t gatt_start; 29 uint32_t mmu_gatt_start; 30 uint32_t gtt_start; 31 uint32_t gtt_phys_start; 32 unsigned gtt_pages; 33 unsigned gatt_pages; 34 unsigned long stolen_size; 35 unsigned long vram_stolen_size; 36 struct rw_semaphore sem; 37 }; 38 39 /* Exported functions */ 40 extern int psb_gtt_init(struct drm_device *dev, int resume); 41 extern void psb_gtt_takedown(struct drm_device *dev); 42 43 /* Each gtt_range describes an allocation in the GTT area */ 44 struct gtt_range { 45 struct resource resource; /* Resource for our allocation */ 46 u32 offset; /* GTT offset of our object */ 47 struct drm_gem_object gem; /* GEM high level stuff */ 48 int in_gart; /* Currently in the GART (ref ct) */ 49 bool stolen; /* Backed from stolen RAM */ 50 bool mmapping; /* Is mmappable */ 51 struct page **pages; /* Backing pages if present */ 52 int npage; /* Number of backing pages */ 53 int roll; /* Roll applied to the GTT entries */ 54 }; 55 56 extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len, 57 const char *name, int backed, 58 u32 align); 59 extern void psb_gtt_kref_put(struct gtt_range *gt); 60 extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt); 61 extern int psb_gtt_pin(struct gtt_range *gt); 62 extern void psb_gtt_unpin(struct gtt_range *gt); 63 extern void psb_gtt_roll(struct drm_device *dev, 64 struct gtt_range *gt, int roll); 65 extern int psb_gtt_restore(struct drm_device *dev); 66 #endif 67