/* 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 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