1/* SPDX-License-Identifier: GPL-2.0-only */
2/**************************************************************************
3 * Copyright (c) 2007-2011, Intel Corporation.
4 * All Rights Reserved.
5 *
6 **************************************************************************/
7
8#ifndef __MMU_H
9#define __MMU_H
10
11struct psb_mmu_driver {
12	/* protects driver- and pd structures. Always take in read mode
13	 * before taking the page table spinlock.
14	 */
15	struct rw_semaphore sem;
16
17	/* protects page tables, directory tables and pt tables.
18	 * and pt structures.
19	 */
20	spinlock_t lock;
21
22	atomic_t needs_tlbflush;
23	atomic_t *msvdx_mmu_invaldc;
24	struct psb_mmu_pd *default_pd;
25	uint32_t bif_ctrl;
26	int has_clflush;
27	int clflush_add;
28	unsigned long clflush_mask;
29
30	struct drm_device *dev;
31};
32
33struct psb_mmu_pd;
34
35struct psb_mmu_pt {
36	struct psb_mmu_pd *pd;
37	uint32_t index;
38	uint32_t count;
39	struct page *p;
40	uint32_t *v;
41};
42
43struct psb_mmu_pd {
44	struct psb_mmu_driver *driver;
45	int hw_context;
46	struct psb_mmu_pt **tables;
47	struct page *p;
48	struct page *dummy_pt;
49	struct page *dummy_page;
50	uint32_t pd_mask;
51	uint32_t invalid_pde;
52	uint32_t invalid_pte;
53};
54
55extern struct psb_mmu_driver *psb_mmu_driver_init(struct drm_device *dev,
56						  int trap_pagefaults,
57						  int invalid_type,
58						  atomic_t *msvdx_mmu_invaldc);
59extern void psb_mmu_driver_takedown(struct psb_mmu_driver *driver);
60extern struct psb_mmu_pd *psb_mmu_get_default_pd(struct psb_mmu_driver
61						 *driver);
62extern struct psb_mmu_pd *psb_mmu_alloc_pd(struct psb_mmu_driver *driver,
63					   int trap_pagefaults,
64					   int invalid_type);
65extern void psb_mmu_free_pagedir(struct psb_mmu_pd *pd);
66extern void psb_mmu_flush(struct psb_mmu_driver *driver);
67extern void psb_mmu_remove_pfn_sequence(struct psb_mmu_pd *pd,
68					unsigned long address,
69					uint32_t num_pages);
70extern int psb_mmu_insert_pfn_sequence(struct psb_mmu_pd *pd,
71				       uint32_t start_pfn,
72				       unsigned long address,
73				       uint32_t num_pages, int type);
74extern int psb_mmu_virtual_to_pfn(struct psb_mmu_pd *pd, uint32_t virtual,
75				  unsigned long *pfn);
76extern void psb_mmu_set_pd_context(struct psb_mmu_pd *pd, int hw_context);
77extern int psb_mmu_insert_pages(struct psb_mmu_pd *pd, struct page **pages,
78				unsigned long address, uint32_t num_pages,
79				uint32_t desired_tile_stride,
80				uint32_t hw_tile_stride, int type);
81extern void psb_mmu_remove_pages(struct psb_mmu_pd *pd,
82				 unsigned long address, uint32_t num_pages,
83				 uint32_t desired_tile_stride,
84				 uint32_t hw_tile_stride);
85
86#endif
87