1/**************************************************************************
2 * Copyright (c) 2007-2011, 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
15#ifndef __MMU_H
16#define __MMU_H
17
18struct psb_mmu_driver {
19	/* protects driver- and pd structures. Always take in read mode
20	 * before taking the page table spinlock.
21	 */
22	struct rw_semaphore sem;
23
24	/* protects page tables, directory tables and pt tables.
25	 * and pt structures.
26	 */
27	spinlock_t lock;
28
29	atomic_t needs_tlbflush;
30	atomic_t *msvdx_mmu_invaldc;
31	struct psb_mmu_pd *default_pd;
32	uint32_t bif_ctrl;
33	int has_clflush;
34	int clflush_add;
35	unsigned long clflush_mask;
36
37	struct drm_device *dev;
38};
39
40struct psb_mmu_pd;
41
42struct psb_mmu_pt {
43	struct psb_mmu_pd *pd;
44	uint32_t index;
45	uint32_t count;
46	struct page *p;
47	uint32_t *v;
48};
49
50struct psb_mmu_pd {
51	struct psb_mmu_driver *driver;
52	int hw_context;
53	struct psb_mmu_pt **tables;
54	struct page *p;
55	struct page *dummy_pt;
56	struct page *dummy_page;
57	uint32_t pd_mask;
58	uint32_t invalid_pde;
59	uint32_t invalid_pte;
60};
61
62extern struct psb_mmu_driver *psb_mmu_driver_init(struct drm_device *dev,
63						  int trap_pagefaults,
64						  int invalid_type,
65						  atomic_t *msvdx_mmu_invaldc);
66extern void psb_mmu_driver_takedown(struct psb_mmu_driver *driver);
67extern struct psb_mmu_pd *psb_mmu_get_default_pd(struct psb_mmu_driver
68						 *driver);
69extern struct psb_mmu_pd *psb_mmu_alloc_pd(struct psb_mmu_driver *driver,
70					   int trap_pagefaults,
71					   int invalid_type);
72extern void psb_mmu_free_pagedir(struct psb_mmu_pd *pd);
73extern void psb_mmu_flush(struct psb_mmu_driver *driver);
74extern void psb_mmu_remove_pfn_sequence(struct psb_mmu_pd *pd,
75					unsigned long address,
76					uint32_t num_pages);
77extern int psb_mmu_insert_pfn_sequence(struct psb_mmu_pd *pd,
78				       uint32_t start_pfn,
79				       unsigned long address,
80				       uint32_t num_pages, int type);
81extern int psb_mmu_virtual_to_pfn(struct psb_mmu_pd *pd, uint32_t virtual,
82				  unsigned long *pfn);
83extern void psb_mmu_set_pd_context(struct psb_mmu_pd *pd, int hw_context);
84extern int psb_mmu_insert_pages(struct psb_mmu_pd *pd, struct page **pages,
85				unsigned long address, uint32_t num_pages,
86				uint32_t desired_tile_stride,
87				uint32_t hw_tile_stride, int type);
88extern void psb_mmu_remove_pages(struct psb_mmu_pd *pd,
89				 unsigned long address, uint32_t num_pages,
90				 uint32_t desired_tile_stride,
91				 uint32_t hw_tile_stride);
92
93#endif
94