| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 |