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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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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms and conditions of the GNU General Public License,
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+ * version 2, as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope it will be useful, but WITHOUT
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+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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+ * more details.
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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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+
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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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+
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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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+
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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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+
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+ struct drm_device *dev;
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+};
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+
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+struct psb_mmu_pd;
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+
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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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+
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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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+
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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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+
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+#endif
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Patrik Jakobsson