drivers/gpu/drm/nouveau/nouveau_notifier.c

   1 /*
   2  * Copyright (C) 2007 Ben Skeggs.
   3  *
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sublicense, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial
  16  * portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  */
  27
  28 #include "drmP.h"
  29 #include "drm.h"
  30 #include "nouveau_drv.h"
  31 #include "nouveau_ramht.h"
  32
  33 int
  34 nouveau_notifier_init_channel(struct nouveau_channel *chan)
  35 {
  36         struct drm_device *dev = chan->dev;
  37         struct nouveau_bo *ntfy = NULL;
  38         uint32_t flags;
  39         int ret;
  40
  41         if (nouveau_vram_notify)
  42                 flags = NOUVEAU_GEM_DOMAIN_VRAM;
  43         else
  44                 flags = NOUVEAU_GEM_DOMAIN_GART;
  45
  46         ret = nouveau_gem_new(dev, NULL, PAGE_SIZE, 0, flags, 0, 0, &ntfy);
  47         if (ret)
  48                 return ret;
  49
  50         ret = nouveau_bo_pin(ntfy, flags);
  51         if (ret)
  52                 goto out_err;
  53
  54         ret = nouveau_bo_map(ntfy);
  55         if (ret)
  56                 goto out_err;
  57
  58         ret = drm_mm_init(&chan->notifier_heap, 0, ntfy->bo.mem.size);
  59         if (ret)
  60                 goto out_err;
  61
  62         chan->notifier_bo = ntfy;
  63 out_err:
  64         if (ret)
  65                 drm_gem_object_unreference_unlocked(ntfy->gem);
  66
  67         return ret;
  68 }
  69
  70 void
  71 nouveau_notifier_takedown_channel(struct nouveau_channel *chan)
  72 {
  73         struct drm_device *dev = chan->dev;
  74
  75         if (!chan->notifier_bo)
  76                 return;
  77
  78         nouveau_bo_unmap(chan->notifier_bo);
  79         mutex_lock(&dev->struct_mutex);
  80         nouveau_bo_unpin(chan->notifier_bo);
  81         mutex_unlock(&dev->struct_mutex);
  82         drm_gem_object_unreference_unlocked(chan->notifier_bo->gem);
  83         drm_mm_takedown(&chan->notifier_heap);
  84 }
  85
  86 static void
  87 nouveau_notifier_gpuobj_dtor(struct drm_device *dev,
  88                              struct nouveau_gpuobj *gpuobj)
  89 {
  90         NV_DEBUG(dev, "\n");
  91
  92         if (gpuobj->priv)
  93                 drm_mm_put_block(gpuobj->priv);
  94 }
  95
  96 int
  97 nouveau_notifier_alloc(struct nouveau_channel *chan, uint32_t handle,
  98                        int size, uint32_t start, uint32_t end,
  99                        uint32_t *b_offset)
 100 {
 101         struct drm_device *dev = chan->dev;
 102         struct drm_nouveau_private *dev_priv = dev->dev_private;
 103         struct nouveau_gpuobj *nobj = NULL;
 104         struct drm_mm_node *mem;
 105         uint32_t offset;
 106         int target, ret;
 107
 108         mem = drm_mm_search_free_in_range(&chan->notifier_heap, size, 0,
 109                                           start, end, 0);
 110         if (mem)
 111                 mem = drm_mm_get_block_range(mem, size, 0, start, end);
 112         if (!mem) {
 113                 NV_ERROR(dev, "Channel %d notifier block full\n", chan->id);
 114                 return -ENOMEM;
 115         }
 116
 117         if (dev_priv->card_type < NV_50) {
 118                 if (chan->notifier_bo->bo.mem.mem_type == TTM_PL_VRAM)
 119                         target = NV_MEM_TARGET_VRAM;
 120                 else
 121                         target = NV_MEM_TARGET_GART;
 122                 offset  = chan->notifier_bo->bo.mem.start << PAGE_SHIFT;
 123         } else {
 124                 target = NV_MEM_TARGET_VM;
 125                 offset = chan->notifier_bo->vma.offset;
 126         }
 127         offset += mem->start;
 128
 129         ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, offset,
 130                                      mem->size, NV_MEM_ACCESS_RW, target,
 131                                      &nobj);
 132         if (ret) {
 133                 drm_mm_put_block(mem);
 134                 NV_ERROR(dev, "Error creating notifier ctxdma: %d\n", ret);
 135                 return ret;
 136         }
 137         nobj->dtor = nouveau_notifier_gpuobj_dtor;
 138         nobj->priv = mem;
 139
 140         ret = nouveau_ramht_insert(chan, handle, nobj);
 141         nouveau_gpuobj_ref(NULL, &nobj);
 142         if (ret) {
 143                 drm_mm_put_block(mem);
 144                 NV_ERROR(dev, "Error adding notifier to ramht: %d\n", ret);
 145                 return ret;
 146         }
 147
 148         *b_offset = mem->start;
 149         return 0;
 150 }
 151
 152 int
 153 nouveau_notifier_offset(struct nouveau_gpuobj *nobj, uint32_t *poffset)
 154 {
 155         if (!nobj || nobj->dtor != nouveau_notifier_gpuobj_dtor)
 156                 return -EINVAL;
 157
 158         if (poffset) {
 159                 struct drm_mm_node *mem = nobj->priv;
 160
 161                 if (*poffset >= mem->size)
 162                         return false;
 163
 164                 *poffset += mem->start;
 165         }
 166
 167         return 0;
 168 }
 169
 170 int
 171 nouveau_ioctl_notifier_alloc(struct drm_device *dev, void *data,
 172                              struct drm_file *file_priv)
 173 {
 174         struct drm_nouveau_private *dev_priv = dev->dev_private;
 175         struct drm_nouveau_notifierobj_alloc *na = data;
 176         struct nouveau_channel *chan;
 177         int ret;
 178
 179         /* completely unnecessary for these chipsets... */
 180         if (unlikely(dev_priv->card_type >= NV_C0))
 181                 return -EINVAL;
 182
 183         chan = nouveau_channel_get(dev, file_priv, na->channel);
 184         if (IS_ERR(chan))
 185                 return PTR_ERR(chan);
 186
 187         ret = nouveau_notifier_alloc(chan, na->handle, na->size, 0, 0x1000,
 188                                      &na->offset);
 189         nouveau_channel_put(&chan);
 190         return ret;
 191 }