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         int ret;
  38
  39         ret = nouveau_gem_new(dev, NULL, PAGE_SIZE, 0, nouveau_vram_notify ?
  40                               TTM_PL_FLAG_VRAM : TTM_PL_FLAG_TT,
  41                               0, 0x0000, false, true, &ntfy);
  42         if (ret)
  43                 return ret;
  44
  45         ret = nouveau_bo_pin(ntfy, TTM_PL_FLAG_VRAM);
  46         if (ret)
  47                 goto out_err;
  48
  49         ret = nouveau_bo_map(ntfy);
  50         if (ret)
  51                 goto out_err;
  52
  53         ret = nouveau_mem_init_heap(&chan->notifier_heap, 0, ntfy->bo.mem.size);
  54         if (ret)
  55                 goto out_err;
  56
  57         chan->notifier_bo = ntfy;
  58 out_err:
  59         if (ret) {
  60                 mutex_lock(&dev->struct_mutex);
  61                 drm_gem_object_unreference(ntfy->gem);
  62                 mutex_unlock(&dev->struct_mutex);
  63         }
  64
  65         return ret;
  66 }
  67
  68 void
  69 nouveau_notifier_takedown_channel(struct nouveau_channel *chan)
  70 {
  71         struct drm_device *dev = chan->dev;
  72
  73         if (!chan->notifier_bo)
  74                 return;
  75
  76         nouveau_bo_unmap(chan->notifier_bo);
  77         mutex_lock(&dev->struct_mutex);
  78         nouveau_bo_unpin(chan->notifier_bo);
  79         drm_gem_object_unreference(chan->notifier_bo->gem);
  80         mutex_unlock(&dev->struct_mutex);
  81         nouveau_mem_takedown(&chan->notifier_heap);
  82 }
  83
  84 static void
  85 nouveau_notifier_gpuobj_dtor(struct drm_device *dev,
  86                              struct nouveau_gpuobj *gpuobj)
  87 {
  88         NV_DEBUG(dev, "\n");
  89
  90         if (gpuobj->priv)
  91                 nouveau_mem_free_block(gpuobj->priv);
  92 }
  93
  94 int
  95 nouveau_notifier_alloc(struct nouveau_channel *chan, uint32_t handle,
  96                        int size, uint32_t *b_offset)
  97 {
  98         struct drm_device *dev = chan->dev;
  99         struct drm_nouveau_private *dev_priv = dev->dev_private;
 100         struct nouveau_gpuobj *nobj = NULL;
 101         struct mem_block *mem;
 102         uint32_t offset;
 103         int target, ret;
 104
 105         if (!chan->notifier_heap) {
 106                 NV_ERROR(dev, "Channel %d doesn't have a notifier heap!\n",
 107                          chan->id);
 108                 return -EINVAL;
 109         }
 110
 111         mem = nouveau_mem_alloc_block(chan->notifier_heap, size, 0,
 112                                       (struct drm_file *)-2, 0);
 113         if (!mem) {
 114                 NV_ERROR(dev, "Channel %d notifier block full\n", chan->id);
 115                 return -ENOMEM;
 116         }
 117
 118         offset = chan->notifier_bo->bo.mem.mm_node->start << PAGE_SHIFT;
 119         if (chan->notifier_bo->bo.mem.mem_type == TTM_PL_VRAM) {
 120                 target = NV_DMA_TARGET_VIDMEM;
 121         } else
 122         if (chan->notifier_bo->bo.mem.mem_type == TTM_PL_TT) {
 123                 if (dev_priv->gart_info.type == NOUVEAU_GART_SGDMA &&
 124                     dev_priv->card_type < NV_50) {
 125                         ret = nouveau_sgdma_get_page(dev, offset, &offset);
 126                         if (ret)
 127                                 return ret;
 128                         target = NV_DMA_TARGET_PCI;
 129                 } else {
 130                         target = NV_DMA_TARGET_AGP;
 131                 }
 132         } else {
 133                 NV_ERROR(dev, "Bad DMA target, mem_type %d!\n",
 134                          chan->notifier_bo->bo.mem.mem_type);
 135                 return -EINVAL;
 136         }
 137         offset += mem->start;
 138
 139         ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, offset,
 140                                      mem->size, NV_DMA_ACCESS_RW, target,
 141                                      &nobj);
 142         if (ret) {
 143                 nouveau_mem_free_block(mem);
 144                 NV_ERROR(dev, "Error creating notifier ctxdma: %d\n", ret);
 145                 return ret;
 146         }
 147         nobj->dtor   = nouveau_notifier_gpuobj_dtor;
 148         nobj->priv   = mem;
 149
 150         ret = nouveau_gpuobj_ref_add(dev, chan, handle, nobj, NULL);
 151         if (ret) {
 152                 nouveau_gpuobj_del(dev, &nobj);
 153                 nouveau_mem_free_block(mem);
 154                 NV_ERROR(dev, "Error referencing notifier ctxdma: %d\n", ret);
 155                 return ret;
 156         }
 157
 158         *b_offset = mem->start;
 159         return 0;
 160 }
 161
 162 int
 163 nouveau_notifier_offset(struct nouveau_gpuobj *nobj, uint32_t *poffset)
 164 {
 165         if (!nobj || nobj->dtor != nouveau_notifier_gpuobj_dtor)
 166                 return -EINVAL;
 167
 168         if (poffset) {
 169                 struct mem_block *mem = nobj->priv;
 170
 171                 if (*poffset >= mem->size)
 172                         return false;
 173
 174                 *poffset += mem->start;
 175         }
 176
 177         return 0;
 178 }
 179
 180 int
 181 nouveau_ioctl_notifier_alloc(struct drm_device *dev, void *data,
 182                              struct drm_file *file_priv)
 183 {
 184         struct drm_nouveau_notifierobj_alloc *na = data;
 185         struct nouveau_channel *chan;
 186         int ret;
 187
 188         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 189         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(na->channel, file_priv, chan);
 190
 191         ret = nouveau_notifier_alloc(chan, na->handle, na->size, &na->offset);
 192         if (ret)
 193                 return ret;
 194
 195         return 0;
 196 }