release/src-rt-6.x.4708/linux/linux-2.6.36/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
  32 int
  33 nouveau_notifier_init_channel(struct nouveau_channel *chan)
  34 {
  35         struct drm_device *dev = chan->dev;
  36         struct nouveau_bo *ntfy = NULL;
  37         uint32_t flags;
  38         int ret;
  39
  40         if (nouveau_vram_notify)
  41                 flags = TTM_PL_FLAG_VRAM;
  42         else
  43                 flags = TTM_PL_FLAG_TT;
  44
  45         ret = nouveau_gem_new(dev, NULL, PAGE_SIZE, 0, flags,
  46                               0, 0x0000, false, true, &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 *b_offset)
  99 {
 100         struct drm_device *dev = chan->dev;
 101         struct drm_nouveau_private *dev_priv = dev->dev_private;
 102         struct nouveau_gpuobj *nobj = NULL;
 103         struct drm_mm_node *mem;
 104         uint32_t offset;
 105         int target, ret;
 106
 107         mem = drm_mm_search_free(&chan->notifier_heap, size, 0, 0);
 108         if (mem)
 109                 mem = drm_mm_get_block(mem, size, 0);
 110         if (!mem) {
 111                 NV_ERROR(dev, "Channel %d notifier block full\n", chan->id);
 112                 return -ENOMEM;
 113         }
 114
 115         offset = chan->notifier_bo->bo.mem.mm_node->start << PAGE_SHIFT;
 116         if (chan->notifier_bo->bo.mem.mem_type == TTM_PL_VRAM) {
 117                 target = NV_DMA_TARGET_VIDMEM;
 118         } else
 119         if (chan->notifier_bo->bo.mem.mem_type == TTM_PL_TT) {
 120                 if (dev_priv->gart_info.type == NOUVEAU_GART_SGDMA &&
 121                     dev_priv->card_type < NV_50) {
 122                         ret = nouveau_sgdma_get_page(dev, offset, &offset);
 123                         if (ret)
 124                                 return ret;
 125                         target = NV_DMA_TARGET_PCI;
 126                 } else {
 127                         target = NV_DMA_TARGET_AGP;
 128                         if (dev_priv->card_type >= NV_50)
 129                                 offset += dev_priv->vm_gart_base;
 130                 }
 131         } else {
 132                 NV_ERROR(dev, "Bad DMA target, mem_type %d!\n",
 133                          chan->notifier_bo->bo.mem.mem_type);
 134                 return -EINVAL;
 135         }
 136         offset += mem->start;
 137
 138         ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, offset,
 139                                      mem->size, NV_DMA_ACCESS_RW, target,
 140                                      &nobj);
 141         if (ret) {
 142                 drm_mm_put_block(mem);
 143                 NV_ERROR(dev, "Error creating notifier ctxdma: %d\n", ret);
 144                 return ret;
 145         }
 146         nobj->dtor = nouveau_notifier_gpuobj_dtor;
 147         nobj->priv = mem;
 148
 149         ret = nouveau_gpuobj_ref_add(dev, chan, handle, nobj, NULL);
 150         if (ret) {
 151                 nouveau_gpuobj_del(dev, &nobj);
 152                 drm_mm_put_block(mem);
 153                 NV_ERROR(dev, "Error referencing notifier ctxdma: %d\n", ret);
 154                 return ret;
 155         }
 156
 157         *b_offset = mem->start;
 158         return 0;
 159 }
 160
 161 int
 162 nouveau_notifier_offset(struct nouveau_gpuobj *nobj, uint32_t *poffset)
 163 {
 164         if (!nobj || nobj->dtor != nouveau_notifier_gpuobj_dtor)
 165                 return -EINVAL;
 166
 167         if (poffset) {
 168                 struct drm_mm_node *mem = nobj->priv;
 169
 170                 if (*poffset >= mem->size)
 171                         return false;
 172
 173                 *poffset += mem->start;
 174         }
 175
 176         return 0;
 177 }
 178
 179 int
 180 nouveau_ioctl_notifier_alloc(struct drm_device *dev, void *data,
 181                              struct drm_file *file_priv)
 182 {
 183         struct drm_nouveau_notifierobj_alloc *na = data;
 184         struct nouveau_channel *chan;
 185         int ret;
 186
 187         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(na->channel, file_priv, chan);
 188
 189         ret = nouveau_notifier_alloc(chan, na->handle, na->size, &na->offset);
 190         if (ret)
 191                 return ret;
 192
 193         return 0;
 194 }