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
|
/* SPDX-License-Identifier: GPL-2.0-only */
/**************************************************************************
* Copyright (c) 2007-2011, Intel Corporation.
* All Rights Reserved.
*
**************************************************************************/
#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
|
