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 drm_nouveau_private *dev_priv = dev->dev_private;
  38         struct nouveau_bo *ntfy = NULL;
  39         uint32_t flags, ttmpl;
  40         int ret;
  41
  42         if (nouveau_vram_notify) {
  43                 flags = NOUVEAU_GEM_DOMAIN_VRAM;
  44                 ttmpl = TTM_PL_FLAG_VRAM;
  45         } else {
  46                 flags = NOUVEAU_GEM_DOMAIN_GART;
  47                 ttmpl = TTM_PL_FLAG_TT;
  48         }
  49
  50         ret = nouveau_gem_new(dev, PAGE_SIZE, 0, flags, 0, 0, &ntfy);
  51         if (ret)
  52                 return ret;
  53
  54         ret = nouveau_bo_pin(ntfy, ttmpl);
  55         if (ret)
  56                 goto out_err;
  57
  58         ret = nouveau_bo_map(ntfy);
  59         if (ret)
  60                 goto out_err;
  61
  62         if (dev_priv->card_type >= NV_50) {
  63                 ret = nouveau_bo_vma_add(ntfy, chan->vm, &chan->notifier_vma);
  64                 if (ret)
  65                         goto out_err;
  66         }
  67
  68         ret = drm_mm_init(&chan->notifier_heap, 0, ntfy->bo.mem.size);
  69         if (ret)
  70                 goto out_err;
  71
  72         chan->notifier_bo = ntfy;
  73 out_err:
  74         if (ret) {
  75                 nouveau_bo_vma_del(ntfy, &chan->notifier_vma);
  76                 drm_gem_object_unreference_unlocked(ntfy->gem);
  77         }
  78
  79         return ret;
  80 }
  81
  82 void
  83 nouveau_notifier_takedown_channel(struct nouveau_channel *chan)
  84 {
  85         struct drm_device *dev = chan->dev;
  86
  87         if (!chan->notifier_bo)
  88                 return;
  89
  90         nouveau_bo_vma_del(chan->notifier_bo, &chan->notifier_vma);
  91         nouveau_bo_unmap(chan->notifier_bo);
  92         mutex_lock(&dev->struct_mutex);
  93         nouveau_bo_unpin(chan->notifier_bo);
  94         mutex_unlock(&dev->struct_mutex);
  95         drm_gem_object_unreference_unlocked(chan->notifier_bo->gem);
  96         drm_mm_takedown(&chan->notifier_heap);
  97 }
  98
  99 static void
 100 nouveau_notifier_gpuobj_dtor(struct drm_device *dev,
 101                              struct nouveau_gpuobj *gpuobj)
 102 {
 103         NV_DEBUG(dev, "\n");
 104
 105         if (gpuobj->priv)
 106                 drm_mm_put_block(gpuobj->priv);
 107 }
 108
 109 int
 110 nouveau_notifier_alloc(struct nouveau_channel *chan, uint32_t handle,
 111                        int size, uint32_t start, uint32_t end,
 112                        uint32_t *b_offset)
 113 {
 114         struct drm_device *dev = chan->dev;
 115         struct drm_nouveau_private *dev_priv = dev->dev_private;
 116         struct nouveau_gpuobj *nobj = NULL;
 117         struct drm_mm_node *mem;
 118         uint32_t offset;
 119         int target, ret;
 120
 121         mem = drm_mm_search_free_in_range(&chan->notifier_heap, size, 0,
 122                                           start, end, 0);
 123         if (mem)
 124                 mem = drm_mm_get_block_range(mem, size, 0, start, end);
 125         if (!mem) {
 126                 NV_ERROR(dev, "Channel %d notifier block full\n", chan->id);
 127                 return -ENOMEM;
 128         }
 129
 130         if (dev_priv->card_type < NV_50) {
 131                 if (chan->notifier_bo->bo.mem.mem_type == TTM_PL_VRAM)
 132                         target = NV_MEM_TARGET_VRAM;
 133                 else
 134                         target = NV_MEM_TARGET_GART;
 135                 offset  = chan->notifier_bo->bo.offset;
 136         } else {
 137                 target = NV_MEM_TARGET_VM;
 138                 offset = chan->notifier_vma.offset;
 139         }
 140         offset += mem->start;
 141
 142         ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, offset,
 143                                      mem->size, NV_MEM_ACCESS_RW, target,
 144                                      &nobj);
 145         if (ret) {
 146                 drm_mm_put_block(mem);
 147                 NV_ERROR(dev, "Error creating notifier ctxdma: %d\n", ret);
 148                 return ret;
 149         }
 150         nobj->dtor = nouveau_notifier_gpuobj_dtor;
 151         nobj->priv = mem;
 152
 153         ret = nouveau_ramht_insert(chan, handle, nobj);
 154         nouveau_gpuobj_ref(NULL, &nobj);
 155         if (ret) {
 156                 drm_mm_put_block(mem);
 157                 NV_ERROR(dev, "Error adding notifier to ramht: %d\n", ret);
 158                 return ret;
 159         }
 160
 161         *b_offset = mem->start;
 162         return 0;
 163 }
 164
 165 int
 166 nouveau_notifier_offset(struct nouveau_gpuobj *nobj, uint32_t *poffset)
 167 {
 168         if (!nobj || nobj->dtor != nouveau_notifier_gpuobj_dtor)
 169                 return -EINVAL;
 170
 171         if (poffset) {
 172                 struct drm_mm_node *mem = nobj->priv;
 173
 174                 if (*poffset >= mem->size)
 175                         return false;
 176
 177                 *poffset += mem->start;
 178         }
 179
 180         return 0;
 181 }
 182
 183 int
 184 nouveau_ioctl_notifier_alloc(struct drm_device *dev, void *data,
 185                              struct drm_file *file_priv)
 186 {
 187         struct drm_nouveau_private *dev_priv = dev->dev_private;
 188         struct drm_nouveau_notifierobj_alloc *na = data;
 189         struct nouveau_channel *chan;
 190         int ret;
 191
 192         /* completely unnecessary for these chipsets... */
 193         if (unlikely(dev_priv->card_type >= NV_C0))
 194                 return -EINVAL;
 195
 196         chan = nouveau_channel_get(file_priv, na->channel);
 197         if (IS_ERR(chan))
 198                 return PTR_ERR(chan);
 199
 200         ret = nouveau_notifier_alloc(chan, na->handle, na->size, 0, 0x1000,
 201                                      &na->offset);
 202         nouveau_channel_put(&chan);
 203         return ret;
 204 }