Blame view

kernel/linux-rt-4.4.41/drivers/gpu/drm/gma500/mmu.h 2.88 KB
5113f6f70   김현기   kernel add
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
  /**************************************************************************
   * Copyright (c) 2007-2011, Intel Corporation.
   * All Rights Reserved.
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms and conditions of the GNU General Public License,
   * version 2, as published by the Free Software Foundation.
   *
   * This program is distributed in the hope it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   * more details.
   **************************************************************************/
  
  #ifndef __MMU_H
  #define __MMU_H
  
  struct psb_mmu_driver {
  	/* protects driver- and pd structures. Always take in read mode
  	 * before taking the page table spinlock.
  	 */
  	struct rw_semaphore sem;
  
  	/* protects page tables, directory tables and pt tables.
  	 * and pt structures.
  	 */
  	spinlock_t lock;
  
  	atomic_t needs_tlbflush;
  	atomic_t *msvdx_mmu_invaldc;
  	struct psb_mmu_pd *default_pd;
  	uint32_t bif_ctrl;
  	int has_clflush;
  	int clflush_add;
  	unsigned long clflush_mask;
  
  	struct drm_device *dev;
  };
  
  struct psb_mmu_pd;
  
  struct psb_mmu_pt {
  	struct psb_mmu_pd *pd;
  	uint32_t index;
  	uint32_t count;
  	struct page *p;
  	uint32_t *v;
  };
  
  struct psb_mmu_pd {
  	struct psb_mmu_driver *driver;
  	int hw_context;
  	struct psb_mmu_pt **tables;
  	struct page *p;
  	struct page *dummy_pt;
  	struct page *dummy_page;
  	uint32_t pd_mask;
  	uint32_t invalid_pde;
  	uint32_t invalid_pte;
  };
  
  extern struct psb_mmu_driver *psb_mmu_driver_init(struct drm_device *dev,
  						  int trap_pagefaults,
  						  int invalid_type,
  						  atomic_t *msvdx_mmu_invaldc);
  extern void psb_mmu_driver_takedown(struct psb_mmu_driver *driver);
  extern struct psb_mmu_pd *psb_mmu_get_default_pd(struct psb_mmu_driver
  						 *driver);
  extern struct psb_mmu_pd *psb_mmu_alloc_pd(struct psb_mmu_driver *driver,
  					   int trap_pagefaults,
  					   int invalid_type);
  extern void psb_mmu_free_pagedir(struct psb_mmu_pd *pd);
  extern void psb_mmu_flush(struct psb_mmu_driver *driver);
  extern void psb_mmu_remove_pfn_sequence(struct psb_mmu_pd *pd,
  					unsigned long address,
  					uint32_t num_pages);
  extern int psb_mmu_insert_pfn_sequence(struct psb_mmu_pd *pd,
  				       uint32_t start_pfn,
  				       unsigned long address,
  				       uint32_t num_pages, int type);
  extern int psb_mmu_virtual_to_pfn(struct psb_mmu_pd *pd, uint32_t virtual,
  				  unsigned long *pfn);
  extern void psb_mmu_set_pd_context(struct psb_mmu_pd *pd, int hw_context);
  extern int psb_mmu_insert_pages(struct psb_mmu_pd *pd, struct page **pages,
  				unsigned long address, uint32_t num_pages,
  				uint32_t desired_tile_stride,
  				uint32_t hw_tile_stride, int type);
  extern void psb_mmu_remove_pages(struct psb_mmu_pd *pd,
  				 unsigned long address, uint32_t num_pages,
  				 uint32_t desired_tile_stride,
  				 uint32_t hw_tile_stride);
  
  #endif