drm/gma500/mmu.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /**************************************************************************
0003  * Copyright (c) 2007-2011, Intel Corporation.
0004  * All Rights Reserved.
0005  *
0006  **************************************************************************/
0007
0008 #ifndef __MMU_H
0009 #define __MMU_H
0010
0011 struct psb_mmu_driver {
0012     /* protects driver- and pd structures. Always take in read mode
0013      * before taking the page table spinlock.
0014      */
0015     struct rw_semaphore sem;
0016
0017     /* protects page tables, directory tables and pt tables.
0018      * and pt structures.
0019      */
0020     spinlock_t lock;
0021
0022     atomic_t needs_tlbflush;
0023     atomic_t *msvdx_mmu_invaldc;
0024     struct psb_mmu_pd *default_pd;
0025     uint32_t bif_ctrl;
0026     int has_clflush;
0027     int clflush_add;
0028     unsigned long clflush_mask;
0029
0030     struct drm_device *dev;
0031 };
0032
0033 struct psb_mmu_pd;
0034
0035 struct psb_mmu_pt {
0036     struct psb_mmu_pd *pd;
0037     uint32_t index;
0038     uint32_t count;
0039     struct page *p;
0040     uint32_t *v;
0041 };
0042
0043 struct psb_mmu_pd {
0044     struct psb_mmu_driver *driver;
0045     int hw_context;
0046     struct psb_mmu_pt **tables;
0047     struct page *p;
0048     struct page *dummy_pt;
0049     struct page *dummy_page;
0050     uint32_t pd_mask;
0051     uint32_t invalid_pde;
0052     uint32_t invalid_pte;
0053 };
0054
0055 extern struct psb_mmu_driver *psb_mmu_driver_init(struct drm_device *dev,
0056                           int trap_pagefaults,
0057                           int invalid_type,
0058                           atomic_t *msvdx_mmu_invaldc);
0059 extern void psb_mmu_driver_takedown(struct psb_mmu_driver *driver);
0060 extern struct psb_mmu_pd *psb_mmu_get_default_pd(struct psb_mmu_driver
0061                          *driver);
0062 extern struct psb_mmu_pd *psb_mmu_alloc_pd(struct psb_mmu_driver *driver,
0063                        int trap_pagefaults,
0064                        int invalid_type);
0065 extern void psb_mmu_free_pagedir(struct psb_mmu_pd *pd);
0066 extern void psb_mmu_flush(struct psb_mmu_driver *driver);
0067 extern void psb_mmu_remove_pfn_sequence(struct psb_mmu_pd *pd,
0068                     unsigned long address,
0069                     uint32_t num_pages);
0070 extern int psb_mmu_insert_pfn_sequence(struct psb_mmu_pd *pd,
0071                        uint32_t start_pfn,
0072                        unsigned long address,
0073                        uint32_t num_pages, int type);
0074 extern int psb_mmu_virtual_to_pfn(struct psb_mmu_pd *pd, uint32_t virtual,
0075                   unsigned long *pfn);
0076 extern void psb_mmu_set_pd_context(struct psb_mmu_pd *pd, int hw_context);
0077 extern int psb_mmu_insert_pages(struct psb_mmu_pd *pd, struct page **pages,
0078                 unsigned long address, uint32_t num_pages,
0079                 uint32_t desired_tile_stride,
0080                 uint32_t hw_tile_stride, int type);
0081 extern void psb_mmu_remove_pages(struct psb_mmu_pd *pd,
0082                  unsigned long address, uint32_t num_pages,
0083                  uint32_t desired_tile_stride,
0084                  uint32_t hw_tile_stride);
0085
0086 #endif