drivers/gpu/drm/ttm/ttm_resource.c

   1 /*
   2  * Copyright 2020 Advanced Micro Devices, 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, sublicense,
   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 shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Christian König
  23  */
  24
  25 #include <drm/ttm/ttm_resource.h>
  26 #include <drm/ttm/ttm_bo_driver.h>
  27
  28 int ttm_resource_alloc(struct ttm_buffer_object *bo,
  29                        const struct ttm_place *place,
  30                        struct ttm_resource *res)
  31 {
  32         struct ttm_resource_manager *man =
  33                 ttm_manager_type(bo->bdev, res->mem_type);
  34
  35         res->mm_node = NULL;
  36         if (!man->func || !man->func->alloc)
  37                 return 0;
  38
  39         return man->func->alloc(man, bo, place, res);
  40 }
  41
  42 void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource *res)
  43 {
  44         struct ttm_resource_manager *man =
  45                 ttm_manager_type(bo->bdev, res->mem_type);
  46
  47         if (man->func && man->func->free)
  48                 man->func->free(man, res);
  49
  50         res->mm_node = NULL;
  51         res->mem_type = TTM_PL_SYSTEM;
  52 }
  53 EXPORT_SYMBOL(ttm_resource_free);
  54
  55 /**
  56  * ttm_resource_manager_init
  57  *
  58  * @man: memory manager object to init
  59  * @p_size: size managed area in pages.
  60  *
  61  * Initialise core parts of a manager object.
  62  */
  63 void ttm_resource_manager_init(struct ttm_resource_manager *man,
  64                                unsigned long p_size)
  65 {
  66         unsigned i;
  67
  68         spin_lock_init(&man->move_lock);
  69         man->size = p_size;
  70
  71         for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
  72                 INIT_LIST_HEAD(&man->lru[i]);
  73         man->move = NULL;
  74 }
  75 EXPORT_SYMBOL(ttm_resource_manager_init);
  76
  77 /*
  78  * ttm_resource_manager_evict_all
  79  *
  80  * @bdev - device to use
  81  * @man - manager to use
  82  *
  83  * Evict all the objects out of a memory manager until it is empty.
  84  * Part of memory manager cleanup sequence.
  85  */
  86 int ttm_resource_manager_evict_all(struct ttm_bo_device *bdev,
  87                                    struct ttm_resource_manager *man)
  88 {
  89         struct ttm_operation_ctx ctx = {
  90                 .interruptible = false,
  91                 .no_wait_gpu = false,
  92                 .force_alloc = true
  93         };
  94         struct ttm_bo_global *glob = &ttm_bo_glob;
  95         struct dma_fence *fence;
  96         int ret;
  97         unsigned i;
  98
  99         /*
 100          * Can't use standard list traversal since we're unlocking.
 101          */
 102
 103         spin_lock(&glob->lru_lock);
 104         for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
 105                 while (!list_empty(&man->lru[i])) {
 106                         spin_unlock(&glob->lru_lock);
 107                         ret = ttm_mem_evict_first(bdev, man, NULL, &ctx,
 108                                                   NULL);
 109                         if (ret)
 110                                 return ret;
 111                         spin_lock(&glob->lru_lock);
 112                 }
 113         }
 114         spin_unlock(&glob->lru_lock);
 115
 116         spin_lock(&man->move_lock);
 117         fence = dma_fence_get(man->move);
 118         spin_unlock(&man->move_lock);
 119
 120         if (fence) {
 121                 ret = dma_fence_wait(fence, false);
 122                 dma_fence_put(fence);
 123                 if (ret)
 124                         return ret;
 125         }
 126
 127         return 0;
 128 }
 129 EXPORT_SYMBOL(ttm_resource_manager_evict_all);
 130
 131 /**
 132  * ttm_resource_manager_debug
 133  *
 134  * @man: manager type to dump.
 135  * @p: printer to use for debug.
 136  */
 137 void ttm_resource_manager_debug(struct ttm_resource_manager *man,
 138                                 struct drm_printer *p)
 139 {
 140         drm_printf(p, "  use_type: %d\n", man->use_type);
 141         drm_printf(p, "  use_tt: %d\n", man->use_tt);
 142         drm_printf(p, "  size: %llu\n", man->size);
 143         if (man->func && man->func->debug)
 144                 (*man->func->debug)(man, p);
 145 }
 146 EXPORT_SYMBOL(ttm_resource_manager_debug);