drivers/gpu/drm/gma500/mmu.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /**************************************************************************
   3  * Copyright (c) 2007-2011, Intel Corporation.
   4  * All Rights Reserved.
   5  *
   6  **************************************************************************/
   7
   8 #ifndef __MMU_H
   9 #define __MMU_H
  10
  11 struct psb_mmu_driver {
  12         /* protects driver- and pd structures. Always take in read mode
  13          * before taking the page table spinlock.
  14          */
  15         struct rw_semaphore sem;
  16
  17         /* protects page tables, directory tables and pt tables.
  18          * and pt structures.
  19          */
  20         spinlock_t lock;
  21
  22         atomic_t needs_tlbflush;
  23         atomic_t *msvdx_mmu_invaldc;
  24         struct psb_mmu_pd *default_pd;
  25         uint32_t bif_ctrl;
  26         int has_clflush;
  27         int clflush_add;
  28         unsigned long clflush_mask;
  29
  30         struct drm_device *dev;
  31 };
  32
  33 struct psb_mmu_pd;
  34
  35 struct psb_mmu_pt {
  36         struct psb_mmu_pd *pd;
  37         uint32_t index;
  38         uint32_t count;
  39         struct page *p;
  40         uint32_t *v;
  41 };
  42
  43 struct psb_mmu_pd {
  44         struct psb_mmu_driver *driver;
  45         int hw_context;
  46         struct psb_mmu_pt **tables;
  47         struct page *p;
  48         struct page *dummy_pt;
  49         struct page *dummy_page;
  50         uint32_t pd_mask;
  51         uint32_t invalid_pde;
  52         uint32_t invalid_pte;
  53 };
  54
  55 extern struct psb_mmu_driver *psb_mmu_driver_init(struct drm_device *dev,
  56                                                   int trap_pagefaults,
  57                                                   int invalid_type,
  58                                                   atomic_t *msvdx_mmu_invaldc);
  59 extern void psb_mmu_driver_takedown(struct psb_mmu_driver *driver);
  60 extern struct psb_mmu_pd *psb_mmu_get_default_pd(struct psb_mmu_driver
  61                                                  *driver);
  62 extern struct psb_mmu_pd *psb_mmu_alloc_pd(struct psb_mmu_driver *driver,
  63                                            int trap_pagefaults,
  64                                            int invalid_type);
  65 extern void psb_mmu_free_pagedir(struct psb_mmu_pd *pd);
  66 extern void psb_mmu_flush(struct psb_mmu_driver *driver);
  67 extern void psb_mmu_remove_pfn_sequence(struct psb_mmu_pd *pd,
  68                                         unsigned long address,
  69                                         uint32_t num_pages);
  70 extern int psb_mmu_insert_pfn_sequence(struct psb_mmu_pd *pd,
  71                                        uint32_t start_pfn,
  72                                        unsigned long address,
  73                                        uint32_t num_pages, int type);
  74 extern int psb_mmu_virtual_to_pfn(struct psb_mmu_pd *pd, uint32_t virtual,
  75                                   unsigned long *pfn);
  76 extern void psb_mmu_set_pd_context(struct psb_mmu_pd *pd, int hw_context);
  77 extern int psb_mmu_insert_pages(struct psb_mmu_pd *pd, struct page **pages,
  78                                 unsigned long address, uint32_t num_pages,
  79                                 uint32_t desired_tile_stride,
  80                                 uint32_t hw_tile_stride, int type);
  81 extern void psb_mmu_remove_pages(struct psb_mmu_pd *pd,
  82                                  unsigned long address, uint32_t num_pages,
  83                                  uint32_t desired_tile_stride,
  84                                  uint32_t hw_tile_stride);
  85
  86 #endif