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 18 struct 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 40 struct psb_mmu_pd; 41 42 struct 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 50 struct 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 62 extern 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); 66 extern void psb_mmu_driver_takedown(struct psb_mmu_driver *driver); 67 extern struct psb_mmu_pd *psb_mmu_get_default_pd(struct psb_mmu_driver 68 *driver); 69 extern struct psb_mmu_pd *psb_mmu_alloc_pd(struct psb_mmu_driver *driver, 70 int trap_pagefaults, 71 int invalid_type); 72 extern void psb_mmu_free_pagedir(struct psb_mmu_pd *pd); 73 extern void psb_mmu_flush(struct psb_mmu_driver *driver); 74 extern void psb_mmu_remove_pfn_sequence(struct psb_mmu_pd *pd, 75 unsigned long address, 76 uint32_t num_pages); 77 extern 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); 81 extern int psb_mmu_virtual_to_pfn(struct psb_mmu_pd *pd, uint32_t virtual, 82 unsigned long *pfn); 83 extern void psb_mmu_set_pd_context(struct psb_mmu_pd *pd, int hw_context); 84 extern 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); 88 extern 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