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 = nouveau_mem_init_heap(&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         nouveau_mem_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                 nouveau_mem_free_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 mem_block *mem;
 104         uint32_t offset;
 105         int target, ret;
 106
 107         if (!chan->notifier_heap) {
 108                 NV_ERROR(dev, "Channel %d doesn't have a notifier heap!\n",
 109                          chan->id);
 110                 return -EINVAL;
 111         }
 112
 113         mem = nouveau_mem_alloc_block(chan->notifier_heap, size, 0,
 114                                       (struct drm_file *)-2, 0);
 115         if (!mem) {
 116                 NV_ERROR(dev, "Channel %d notifier block full\n", chan->id);
 117                 return -ENOMEM;
 118         }
 119
 120         offset = chan->notifier_bo->bo.mem.mm_node->start << PAGE_SHIFT;
 121         if (chan->notifier_bo->bo.mem.mem_type == TTM_PL_VRAM) {
 122                 target = NV_DMA_TARGET_VIDMEM;
 123         } else
 124         if (chan->notifier_bo->bo.mem.mem_type == TTM_PL_TT) {
 125                 if (dev_priv->gart_info.type == NOUVEAU_GART_SGDMA &&
 126                     dev_priv->card_type < NV_50) {
 127                         ret = nouveau_sgdma_get_page(dev, offset, &offset);
 128                         if (ret)
 129                                 return ret;
 130                         target = NV_DMA_TARGET_PCI;
 131                 } else {
 132                         target = NV_DMA_TARGET_AGP;
 133                         if (dev_priv->card_type >= NV_50)
 134                                 offset += dev_priv->vm_gart_base;
 135                 }
 136         } else {
 137                 NV_ERROR(dev, "Bad DMA target, mem_type %d!\n",
 138                          chan->notifier_bo->bo.mem.mem_type);
 139                 return -EINVAL;
 140         }
 141         offset += mem->start;
 142
 143         ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, offset,
 144                                      mem->size, NV_DMA_ACCESS_RW, target,
 145                                      &nobj);
 146         if (ret) {
 147                 nouveau_mem_free_block(mem);
 148                 NV_ERROR(dev, "Error creating notifier ctxdma: %d\n", ret);
 149                 return ret;
 150         }
 151         nobj->dtor   = nouveau_notifier_gpuobj_dtor;
 152         nobj->priv   = mem;
 153
 154         ret = nouveau_gpuobj_ref_add(dev, chan, handle, nobj, NULL);
 155         if (ret) {
 156                 nouveau_gpuobj_del(dev, &nobj);
 157                 nouveau_mem_free_block(mem);
 158                 NV_ERROR(dev, "Error referencing notifier ctxdma: %d\n", ret);
 159                 return ret;
 160         }
 161
 162         *b_offset = mem->start;
 163         return 0;
 164 }
 165
 166 int
 167 nouveau_notifier_offset(struct nouveau_gpuobj *nobj, uint32_t *poffset)
 168 {
 169         if (!nobj || nobj->dtor != nouveau_notifier_gpuobj_dtor)
 170                 return -EINVAL;
 171
 172         if (poffset) {
 173                 struct mem_block *mem = nobj->priv;
 174
 175                 if (*poffset >= mem->size)
 176                         return false;
 177
 178                 *poffset += mem->start;
 179         }
 180
 181         return 0;
 182 }
 183
 184 int
 185 nouveau_ioctl_notifier_alloc(struct drm_device *dev, void *data,
 186                              struct drm_file *file_priv)
 187 {
 188         struct drm_nouveau_notifierobj_alloc *na = data;
 189         struct nouveau_channel *chan;
 190         int ret;
 191
 192         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 193         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(na->channel, file_priv, chan);
 194
 195         ret = nouveau_notifier_alloc(chan, na->handle, na->size, &na->offset);
 196         if (ret)
 197                 return ret;
 198
 199         return 0;
 200 }