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, place->mem_type);
  34
  35         res->mm_node = NULL;
  36         res->start = 0;
  37         res->num_pages = PFN_UP(bo->base.size);
  38         res->mem_type = place->mem_type;
  39         res->placement = place->flags;
  40         res->bus.addr = NULL;
  41         res->bus.offset = 0;
  42         res->bus.is_iomem = false;
  43         res->bus.caching = ttm_cached;
  44
  45         return man->func->alloc(man, bo, place, res);
  46 }
  47
  48 void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource *res)
  49 {
  50         struct ttm_resource_manager *man =
  51                 ttm_manager_type(bo->bdev, res->mem_type);
  52
  53         man->func->free(man, res);
  54         res->mm_node = NULL;
  55         res->mem_type = TTM_PL_SYSTEM;
  56 }
  57 EXPORT_SYMBOL(ttm_resource_free);
  58
  59 /**
  60  * ttm_resource_manager_init
  61  *
  62  * @man: memory manager object to init
  63  * @p_size: size managed area in pages.
  64  *
  65  * Initialise core parts of a manager object.
  66  */
  67 void ttm_resource_manager_init(struct ttm_resource_manager *man,
  68                                unsigned long p_size)
  69 {
  70         unsigned i;
  71
  72         spin_lock_init(&man->move_lock);
  73         man->size = p_size;
  74
  75         for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
  76                 INIT_LIST_HEAD(&man->lru[i]);
  77         man->move = NULL;
  78 }
  79 EXPORT_SYMBOL(ttm_resource_manager_init);
  80
  81 /*
  82  * ttm_resource_manager_evict_all
  83  *
  84  * @bdev - device to use
  85  * @man - manager to use
  86  *
  87  * Evict all the objects out of a memory manager until it is empty.
  88  * Part of memory manager cleanup sequence.
  89  */
  90 int ttm_resource_manager_evict_all(struct ttm_device *bdev,
  91                                    struct ttm_resource_manager *man)
  92 {
  93         struct ttm_operation_ctx ctx = {
  94                 .interruptible = false,
  95                 .no_wait_gpu = false,
  96                 .force_alloc = true
  97         };
  98         struct dma_fence *fence;
  99         int ret;
 100         unsigned i;
 101
 102         /*
 103          * Can't use standard list traversal since we're unlocking.
 104          */
 105
 106         spin_lock(&bdev->lru_lock);
 107         for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
 108                 while (!list_empty(&man->lru[i])) {
 109                         spin_unlock(&bdev->lru_lock);
 110                         ret = ttm_mem_evict_first(bdev, man, NULL, &ctx,
 111                                                   NULL);
 112                         if (ret)
 113                                 return ret;
 114                         spin_lock(&bdev->lru_lock);
 115                 }
 116         }
 117         spin_unlock(&bdev->lru_lock);
 118
 119         spin_lock(&man->move_lock);
 120         fence = dma_fence_get(man->move);
 121         spin_unlock(&man->move_lock);
 122
 123         if (fence) {
 124                 ret = dma_fence_wait(fence, false);
 125                 dma_fence_put(fence);
 126                 if (ret)
 127                         return ret;
 128         }
 129
 130         return 0;
 131 }
 132 EXPORT_SYMBOL(ttm_resource_manager_evict_all);
 133
 134 /**
 135  * ttm_resource_manager_debug
 136  *
 137  * @man: manager type to dump.
 138  * @p: printer to use for debug.
 139  */
 140 void ttm_resource_manager_debug(struct ttm_resource_manager *man,
 141                                 struct drm_printer *p)
 142 {
 143         drm_printf(p, "  use_type: %d\n", man->use_type);
 144         drm_printf(p, "  use_tt: %d\n", man->use_tt);
 145         drm_printf(p, "  size: %llu\n", man->size);
 146         if (man->func->debug)
 147                 man->func->debug(man, p);
 148 }
 149 EXPORT_SYMBOL(ttm_resource_manager_debug);