diff options
Diffstat (limited to 'drivers/gpu/drm/gma500/gtt.h')
| -rw-r--r-- | drivers/gpu/drm/gma500/gtt.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/gtt.h b/drivers/gpu/drm/gma500/gtt.h new file mode 100644 index 000000000..3cf190295 --- /dev/null +++ b/drivers/gpu/drm/gma500/gtt.h @@ -0,0 +1,55 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/************************************************************************** + * Copyright (c) 2007-2008, Intel Corporation. + * All Rights Reserved. + * + **************************************************************************/ + +#ifndef _PSB_GTT_H_ +#define _PSB_GTT_H_ + +#include <drm/drm_gem.h> + +/* This wants cleaning up with respect to the psb_dev and un-needed stuff */ +struct psb_gtt { + uint32_t gatt_start; + uint32_t mmu_gatt_start; + uint32_t gtt_start; + uint32_t gtt_phys_start; + unsigned gtt_pages; + unsigned gatt_pages; + unsigned long stolen_size; + unsigned long vram_stolen_size; + struct rw_semaphore sem; +}; + +/* Exported functions */ +extern int psb_gtt_init(struct drm_device *dev, int resume); +extern void psb_gtt_takedown(struct drm_device *dev); + +/* Each gtt_range describes an allocation in the GTT area */ +struct gtt_range { + struct resource resource; /* Resource for our allocation */ + u32 offset; /* GTT offset of our object */ + struct drm_gem_object gem; /* GEM high level stuff */ + int in_gart; /* Currently in the GART (ref ct) */ + bool stolen; /* Backed from stolen RAM */ + bool mmapping; /* Is mmappable */ + struct page **pages; /* Backing pages if present */ + int npage; /* Number of backing pages */ + int roll; /* Roll applied to the GTT entries */ +}; + +#define to_gtt_range(x) container_of(x, struct gtt_range, gem) + +extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len, + const char *name, int backed, + u32 align); +extern void psb_gtt_kref_put(struct gtt_range *gt); +extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt); +extern int psb_gtt_pin(struct gtt_range *gt); +extern void psb_gtt_unpin(struct gtt_range *gt); +extern void psb_gtt_roll(struct drm_device *dev, + struct gtt_range *gt, int roll); +extern int psb_gtt_restore(struct drm_device *dev); +#endif |