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2025cf9e19
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 263 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.208660670@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/**************************************************************************
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* Copyright (c) 2007-2011, Intel Corporation.
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* All Rights Reserved.
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*
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**************************************************************************/
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#ifndef __MMU_H
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#define __MMU_H
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struct psb_mmu_driver {
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/* protects driver- and pd structures. Always take in read mode
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* before taking the page table spinlock.
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*/
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struct rw_semaphore sem;
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/* protects page tables, directory tables and pt tables.
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* and pt structures.
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*/
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spinlock_t lock;
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atomic_t needs_tlbflush;
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atomic_t *msvdx_mmu_invaldc;
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struct psb_mmu_pd *default_pd;
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uint32_t bif_ctrl;
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int has_clflush;
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int clflush_add;
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unsigned long clflush_mask;
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struct drm_device *dev;
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};
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struct psb_mmu_pd;
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struct psb_mmu_pt {
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struct psb_mmu_pd *pd;
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uint32_t index;
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uint32_t count;
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struct page *p;
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uint32_t *v;
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};
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struct psb_mmu_pd {
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struct psb_mmu_driver *driver;
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int hw_context;
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struct psb_mmu_pt **tables;
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struct page *p;
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struct page *dummy_pt;
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struct page *dummy_page;
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uint32_t pd_mask;
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uint32_t invalid_pde;
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uint32_t invalid_pte;
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};
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extern struct psb_mmu_driver *psb_mmu_driver_init(struct drm_device *dev,
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int trap_pagefaults,
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int invalid_type,
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atomic_t *msvdx_mmu_invaldc);
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extern void psb_mmu_driver_takedown(struct psb_mmu_driver *driver);
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extern struct psb_mmu_pd *psb_mmu_get_default_pd(struct psb_mmu_driver
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*driver);
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extern struct psb_mmu_pd *psb_mmu_alloc_pd(struct psb_mmu_driver *driver,
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int trap_pagefaults,
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int invalid_type);
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extern void psb_mmu_free_pagedir(struct psb_mmu_pd *pd);
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extern void psb_mmu_flush(struct psb_mmu_driver *driver);
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extern void psb_mmu_remove_pfn_sequence(struct psb_mmu_pd *pd,
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unsigned long address,
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uint32_t num_pages);
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extern int psb_mmu_insert_pfn_sequence(struct psb_mmu_pd *pd,
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uint32_t start_pfn,
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unsigned long address,
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uint32_t num_pages, int type);
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extern int psb_mmu_virtual_to_pfn(struct psb_mmu_pd *pd, uint32_t virtual,
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unsigned long *pfn);
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extern void psb_mmu_set_pd_context(struct psb_mmu_pd *pd, int hw_context);
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extern int psb_mmu_insert_pages(struct psb_mmu_pd *pd, struct page **pages,
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unsigned long address, uint32_t num_pages,
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uint32_t desired_tile_stride,
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uint32_t hw_tile_stride, int type);
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extern void psb_mmu_remove_pages(struct psb_mmu_pd *pd,
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unsigned long address, uint32_t num_pages,
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uint32_t desired_tile_stride,
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uint32_t hw_tile_stride);
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#endif
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