drivers/gpu/drm/nouveau/nvc0_fence.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Ben Skeggs
  23  */
  24
  25 #include "drmP.h"
  26 #include "nouveau_drv.h"
  27 #include "nouveau_dma.h"
  28 #include <engine/fifo.h>
  29 #include <core/ramht.h>
  30 #include "nouveau_fence.h"
  31
  32 struct nvc0_fence_priv {
  33         struct nouveau_fence_priv base;
  34         struct nouveau_bo *bo;
  35         u32 *suspend;
  36 };
  37
  38 struct nvc0_fence_chan {
  39         struct nouveau_fence_chan base;
  40         struct nouveau_vma vma;
  41 };
  42
  43 static int
  44 nvc0_fence_emit(struct nouveau_fence *fence)
  45 {
  46         struct nouveau_channel *chan = fence->channel;
  47         struct nvc0_fence_chan *fctx = chan->fence;
  48         u64 addr = fctx->vma.offset + chan->id * 16;
  49         int ret;
  50
  51         ret = RING_SPACE(chan, 5);
  52         if (ret == 0) {
  53                 BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
  54                 OUT_RING  (chan, upper_32_bits(addr));
  55                 OUT_RING  (chan, lower_32_bits(addr));
  56                 OUT_RING  (chan, fence->sequence);
  57                 OUT_RING  (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_WRITE_LONG);
  58                 FIRE_RING (chan);
  59         }
  60
  61         return ret;
  62 }
  63
  64 static int
  65 nvc0_fence_sync(struct nouveau_fence *fence,
  66                 struct nouveau_channel *prev, struct nouveau_channel *chan)
  67 {
  68         struct nvc0_fence_chan *fctx = chan->fence;
  69         u64 addr = fctx->vma.offset + prev->id * 16;
  70         int ret;
  71
  72         ret = RING_SPACE(chan, 5);
  73         if (ret == 0) {
  74                 BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
  75                 OUT_RING  (chan, upper_32_bits(addr));
  76                 OUT_RING  (chan, lower_32_bits(addr));
  77                 OUT_RING  (chan, fence->sequence);
  78                 OUT_RING  (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_GEQUAL |
  79                                  NVC0_SUBCHAN_SEMAPHORE_TRIGGER_YIELD);
  80                 FIRE_RING (chan);
  81         }
  82
  83         return ret;
  84 }
  85
  86 static u32
  87 nvc0_fence_read(struct nouveau_channel *chan)
  88 {
  89         struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
  90         struct nvc0_fence_priv *priv = dev_priv->fence.func;
  91         return nouveau_bo_rd32(priv->bo, chan->id * 16/4);
  92 }
  93
  94 static void
  95 nvc0_fence_context_del(struct nouveau_channel *chan)
  96 {
  97         struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
  98         struct nvc0_fence_priv *priv = dev_priv->fence.func;
  99         struct nvc0_fence_chan *fctx = chan->fence;
 100
 101         nouveau_bo_vma_del(priv->bo, &fctx->vma);
 102         nouveau_fence_context_del(&fctx->base);
 103         chan->fence = NULL;
 104         kfree(fctx);
 105 }
 106
 107 static int
 108 nvc0_fence_context_new(struct nouveau_channel *chan)
 109 {
 110         struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
 111         struct nvc0_fence_priv *priv = dev_priv->fence.func;
 112         struct nvc0_fence_chan *fctx;
 113         int ret;
 114
 115         fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
 116         if (!fctx)
 117                 return -ENOMEM;
 118
 119         nouveau_fence_context_new(&fctx->base);
 120
 121         ret = nouveau_bo_vma_add(priv->bo, chan->vm, &fctx->vma);
 122         if (ret)
 123                 nvc0_fence_context_del(chan);
 124
 125         nouveau_bo_wr32(priv->bo, chan->id * 16/4, 0x00000000);
 126         return ret;
 127 }
 128
 129 static bool
 130 nvc0_fence_suspend(struct drm_device *dev)
 131 {
 132         struct nouveau_fifo_priv *pfifo = nv_engine(dev, NVOBJ_ENGINE_FIFO);
 133         struct drm_nouveau_private *dev_priv = dev->dev_private;
 134         struct nvc0_fence_priv *priv = dev_priv->fence.func;
 135         int i;
 136
 137         priv->suspend = vmalloc(pfifo->channels * sizeof(u32));
 138         if (priv->suspend) {
 139                 for (i = 0; i < pfifo->channels; i++)
 140                         priv->suspend[i] = nouveau_bo_rd32(priv->bo, i);
 141         }
 142
 143         return priv->suspend != NULL;
 144 }
 145
 146 static void
 147 nvc0_fence_resume(struct drm_device *dev)
 148 {
 149         struct nouveau_fifo_priv *pfifo = nv_engine(dev, NVOBJ_ENGINE_FIFO);
 150         struct drm_nouveau_private *dev_priv = dev->dev_private;
 151         struct nvc0_fence_priv *priv = dev_priv->fence.func;
 152         int i;
 153
 154         if (priv->suspend) {
 155                 for (i = 0; i < pfifo->channels; i++)
 156                         nouveau_bo_wr32(priv->bo, i, priv->suspend[i]);
 157                 vfree(priv->suspend);
 158                 priv->suspend = NULL;
 159         }
 160 }
 161
 162 static void
 163 nvc0_fence_destroy(struct drm_device *dev)
 164 {
 165         struct drm_nouveau_private *dev_priv = dev->dev_private;
 166         struct nvc0_fence_priv *priv = dev_priv->fence.func;
 167
 168         nouveau_bo_unmap(priv->bo);
 169         nouveau_bo_ref(NULL, &priv->bo);
 170         dev_priv->fence.func = NULL;
 171         kfree(priv);
 172 }
 173
 174 int
 175 nvc0_fence_create(struct drm_device *dev)
 176 {
 177         struct nouveau_fifo_priv *pfifo = nv_engine(dev, NVOBJ_ENGINE_FIFO);
 178         struct drm_nouveau_private *dev_priv = dev->dev_private;
 179         struct nvc0_fence_priv *priv;
 180         int ret;
 181
 182         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 183         if (!priv)
 184                 return -ENOMEM;
 185
 186         priv->base.dtor = nvc0_fence_destroy;
 187         priv->base.suspend = nvc0_fence_suspend;
 188         priv->base.resume = nvc0_fence_resume;
 189         priv->base.context_new = nvc0_fence_context_new;
 190         priv->base.context_del = nvc0_fence_context_del;
 191         priv->base.emit = nvc0_fence_emit;
 192         priv->base.sync = nvc0_fence_sync;
 193         priv->base.read = nvc0_fence_read;
 194         dev_priv->fence.func = priv;
 195
 196         ret = nouveau_bo_new(dev, 16 * pfifo->channels, 0, TTM_PL_FLAG_VRAM,
 197                              0, 0, NULL, &priv->bo);
 198         if (ret == 0) {
 199                 ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM);
 200                 if (ret == 0)
 201                         ret = nouveau_bo_map(priv->bo);
 202                 if (ret)
 203                         nouveau_bo_ref(NULL, &priv->bo);
 204         }
 205
 206         if (ret)
 207                 nvc0_fence_destroy(dev);
 208         return ret;
 209 }