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, ttmpl;
  39         int ret;
  40
  41         if (nouveau_vram_notify) {
  42                 flags = NOUVEAU_GEM_DOMAIN_VRAM;
  43                 ttmpl = TTM_PL_FLAG_VRAM;
  44         } else {
  45                 flags = NOUVEAU_GEM_DOMAIN_GART;
  46                 ttmpl = TTM_PL_FLAG_TT;
  47         }
  48
  49         ret = nouveau_gem_new(dev, NULL, PAGE_SIZE, 0, flags, 0, 0, &ntfy);
  50         if (ret)
  51                 return ret;
  52
  53         ret = nouveau_bo_pin(ntfy, ttmpl);
  54         if (ret)
  55                 goto out_err;
  56
  57         ret = nouveau_bo_map(ntfy);
  58         if (ret)
  59                 goto out_err;
  60
  61         ret = drm_mm_init(&chan->notifier_heap, 0, ntfy->bo.mem.size);
  62         if (ret)
  63                 goto out_err;
  64
  65         chan->notifier_bo = ntfy;
  66 out_err:
  67         if (ret)
  68                 drm_gem_object_unreference_unlocked(ntfy->gem);
  69
  70         return ret;
  71 }
  72
  73 void
  74 nouveau_notifier_takedown_channel(struct nouveau_channel *chan)
  75 {
  76         struct drm_device *dev = chan->dev;
  77
  78         if (!chan->notifier_bo)
  79                 return;
  80
  81         nouveau_bo_unmap(chan->notifier_bo);
  82         mutex_lock(&dev->struct_mutex);
  83         nouveau_bo_unpin(chan->notifier_bo);
  84         mutex_unlock(&dev->struct_mutex);
  85         drm_gem_object_unreference_unlocked(chan->notifier_bo->gem);
  86         drm_mm_takedown(&chan->notifier_heap);
  87 }
  88
  89 static void
  90 nouveau_notifier_gpuobj_dtor(struct drm_device *dev,
  91                              struct nouveau_gpuobj *gpuobj)
  92 {
  93         NV_DEBUG(dev, "\n");
  94
  95         if (gpuobj->priv)
  96                 drm_mm_put_block(gpuobj->priv);
  97 }
  98
  99 int
 100 nouveau_notifier_alloc(struct nouveau_channel *chan, uint32_t handle,
 101                        int size, uint32_t start, uint32_t end,
 102                        uint32_t *b_offset)
 103 {
 104         struct drm_device *dev = chan->dev;
 105         struct drm_nouveau_private *dev_priv = dev->dev_private;
 106         struct nouveau_gpuobj *nobj = NULL;
 107         struct drm_mm_node *mem;
 108         uint32_t offset;
 109         int target, ret;
 110
 111         mem = drm_mm_search_free_in_range(&chan->notifier_heap, size, 0,
 112                                           start, end, 0);
 113         if (mem)
 114                 mem = drm_mm_get_block_range(mem, size, 0, start, end);
 115         if (!mem) {
 116                 NV_ERROR(dev, "Channel %d notifier block full\n", chan->id);
 117                 return -ENOMEM;
 118         }
 119
 120         if (dev_priv->card_type < NV_50) {
 121                 if (chan->notifier_bo->bo.mem.mem_type == TTM_PL_VRAM)
 122                         target = NV_MEM_TARGET_VRAM;
 123                 else
 124                         target = NV_MEM_TARGET_GART;
 125                 offset  = chan->notifier_bo->bo.mem.start << PAGE_SHIFT;
 126         } else {
 127                 target = NV_MEM_TARGET_VM;
 128                 offset = chan->notifier_bo->vma.offset;
 129         }
 130         offset += mem->start;
 131
 132         ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, offset,
 133                                      mem->size, NV_MEM_ACCESS_RW, target,
 134                                      &nobj);
 135         if (ret) {
 136                 drm_mm_put_block(mem);
 137                 NV_ERROR(dev, "Error creating notifier ctxdma: %d\n", ret);
 138                 return ret;
 139         }
 140         nobj->dtor = nouveau_notifier_gpuobj_dtor;
 141         nobj->priv = mem;
 142
 143         ret = nouveau_ramht_insert(chan, handle, nobj);
 144         nouveau_gpuobj_ref(NULL, &nobj);
 145         if (ret) {
 146                 drm_mm_put_block(mem);
 147                 NV_ERROR(dev, "Error adding notifier to ramht: %d\n", ret);
 148                 return ret;
 149         }
 150
 151         *b_offset = mem->start;
 152         return 0;
 153 }
 154
 155 int
 156 nouveau_notifier_offset(struct nouveau_gpuobj *nobj, uint32_t *poffset)
 157 {
 158         if (!nobj || nobj->dtor != nouveau_notifier_gpuobj_dtor)
 159                 return -EINVAL;
 160
 161         if (poffset) {
 162                 struct drm_mm_node *mem = nobj->priv;
 163
 164                 if (*poffset >= mem->size)
 165                         return false;
 166
 167                 *poffset += mem->start;
 168         }
 169
 170         return 0;
 171 }
 172
 173 int
 174 nouveau_ioctl_notifier_alloc(struct drm_device *dev, void *data,
 175                              struct drm_file *file_priv)
 176 {
 177         struct drm_nouveau_private *dev_priv = dev->dev_private;
 178         struct drm_nouveau_notifierobj_alloc *na = data;
 179         struct nouveau_channel *chan;
 180         int ret;
 181
 182         /* completely unnecessary for these chipsets... */
 183         if (unlikely(dev_priv->card_type >= NV_C0))
 184                 return -EINVAL;
 185
 186         chan = nouveau_channel_get(dev, file_priv, na->channel);
 187         if (IS_ERR(chan))
 188                 return PTR_ERR(chan);
 189
 190         ret = nouveau_notifier_alloc(chan, na->handle, na->size, 0, 0x1000,
 191                                      &na->offset);
 192         nouveau_channel_put(&chan);
 193         return ret;
 194 }