Line data    Source code

       1             : /*
       2             :  * Copyright (c) Red Hat Inc.
       3             : 
       4             :  * Permission is hereby granted, free of charge, to any person obtaining a
       5             :  * copy of this software and associated documentation files (the "Software"),
       6             :  * to deal in the Software without restriction, including without limitation
       7             :  * the rights to use, copy, modify, merge, publish, distribute, sub license,
       8             :  * and/or sell copies of the Software, and to permit persons to whom the
       9             :  * Software is furnished to do so, subject to the following conditions:
      10             :  *
      11             :  * The above copyright notice and this permission notice (including the
      12             :  * next paragraph) shall be included in all copies or substantial portions
      13             :  * of the Software.
      14             :  *
      15             :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      16             :  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      17             :  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
      18             :  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      19             :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      20             :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
      21             :  * DEALINGS IN THE SOFTWARE.
      22             :  *
      23             :  * Authors: Dave Airlie <airlied@redhat.com>
      24             :  *          Jerome Glisse <jglisse@redhat.com>
      25             :  */
      26             : #ifndef TTM_PAGE_ALLOC
      27             : #define TTM_PAGE_ALLOC
      28             : 
      29             : #include <dev/pci/drm/ttm/ttm_bo_driver.h>
      30             : #include <dev/pci/drm/ttm/ttm_memory.h>
      31             : 
      32             : struct device;
      33             : 
      34             : /**
      35             :  * Initialize pool allocator.
      36             :  */
      37             : int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
      38             : /**
      39             :  * Free pool allocator.
      40             :  */
      41             : void ttm_page_alloc_fini(void);
      42             : 
      43             : /**
      44             :  * ttm_pool_populate:
      45             :  *
      46             :  * @ttm: The struct ttm_tt to contain the backing pages.
      47             :  *
      48             :  * Add backing pages to all of @ttm
      49             :  */
      50             : extern int ttm_pool_populate(struct ttm_tt *ttm);
      51             : 
      52             : /**
      53             :  * ttm_pool_unpopulate:
      54             :  *
      55             :  * @ttm: The struct ttm_tt which to free backing pages.
      56             :  *
      57             :  * Free all pages of @ttm
      58             :  */
      59             : extern void ttm_pool_unpopulate(struct ttm_tt *ttm);
      60             : 
      61             : /**
      62             :  * Output the state of pools to debugfs file
      63             :  */
      64             : extern int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
      65             : 
      66             : 
      67             : #if defined(CONFIG_SWIOTLB) || defined(CONFIG_INTEL_IOMMU)
      68             : /**
      69             :  * Initialize pool allocator.
      70             :  */
      71             : int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
      72             : 
      73             : /**
      74             :  * Free pool allocator.
      75             :  */
      76             : void ttm_dma_page_alloc_fini(void);
      77             : 
      78             : /**
      79             :  * Output the state of pools to debugfs file
      80             :  */
      81             : extern int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data);
      82             : 
      83             : extern int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev);
      84             : extern void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev);
      85             : 
      86             : #else
      87           0 : static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob,
      88             :                                           unsigned max_pages)
      89             : {
      90           0 :         return -ENODEV;
      91             : }
      92             : 
      93           0 : static inline void ttm_dma_page_alloc_fini(void) { return; }
      94             : 
      95             : static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
      96             : {
      97             :         return 0;
      98             : }
      99             : static inline int ttm_dma_populate(struct ttm_dma_tt *ttm_dma,
     100             :                                    struct device *dev)
     101             : {
     102             :         return -ENOMEM;
     103             : }
     104             : static inline void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma,
     105             :                                       struct device *dev)
     106             : {
     107             : }
     108             : #endif
     109             : 
     110             : #endif