drivers/gpu/drm/nouveau/nv04_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 "nouveau_ramht.h"
  29 #include "nouveau_fence.h"
  30
  31 struct nv04_fence_chan {
  32         struct nouveau_fence_chan base;
  33         atomic_t sequence;
  34 };
  35
  36 struct nv04_fence_priv {
  37         struct nouveau_fence_priv base;
  38 };
  39
  40 static int
  41 nv04_fence_emit(struct nouveau_fence *fence)
  42 {
  43         struct nouveau_channel *chan = fence->channel;
  44         int ret = RING_SPACE(chan, 2);
  45         if (ret == 0) {
  46                 BEGIN_NV04(chan, NvSubSw, 0x0150, 1);
  47                 OUT_RING  (chan, fence->sequence);
  48                 FIRE_RING (chan);
  49         }
  50         return ret;
  51 }
  52
  53 static int
  54 nv04_fence_sync(struct nouveau_fence *fence, struct nouveau_channel *chan)
  55 {
  56         return -ENODEV;
  57 }
  58
  59 int
  60 nv04_fence_mthd(struct nouveau_channel *chan, u32 class, u32 mthd, u32 data)
  61 {
  62         struct nv04_fence_chan *fctx = chan->engctx[NVOBJ_ENGINE_FENCE];
  63         atomic_set(&fctx->sequence, data);
  64         return 0;
  65 }
  66
  67 static u32
  68 nv04_fence_read(struct nouveau_channel *chan)
  69 {
  70         struct nv04_fence_chan *fctx = chan->engctx[NVOBJ_ENGINE_FENCE];
  71         return atomic_read(&fctx->sequence);
  72 }
  73
  74 static void
  75 nv04_fence_context_del(struct nouveau_channel *chan, int engine)
  76 {
  77         struct nv04_fence_chan *fctx = chan->engctx[engine];
  78         nouveau_fence_context_del(&fctx->base);
  79         chan->engctx[engine] = NULL;
  80         kfree(fctx);
  81 }
  82
  83 static int
  84 nv04_fence_context_new(struct nouveau_channel *chan, int engine)
  85 {
  86         struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);
  87         if (fctx) {
  88                 nouveau_fence_context_new(&fctx->base);
  89                 atomic_set(&fctx->sequence, 0);
  90                 chan->engctx[engine] = fctx;
  91                 return 0;
  92         }
  93         return -ENOMEM;
  94 }
  95
  96 static int
  97 nv04_fence_fini(struct drm_device *dev, int engine, bool suspend)
  98 {
  99         return 0;
 100 }
 101
 102 static int
 103 nv04_fence_init(struct drm_device *dev, int engine)
 104 {
 105         return 0;
 106 }
 107
 108 static void
 109 nv04_fence_destroy(struct drm_device *dev, int engine)
 110 {
 111         struct drm_nouveau_private *dev_priv = dev->dev_private;
 112         struct nv04_fence_priv *priv = nv_engine(dev, engine);
 113
 114         dev_priv->eng[engine] = NULL;
 115         kfree(priv);
 116 }
 117
 118 int
 119 nv04_fence_create(struct drm_device *dev)
 120 {
 121         struct drm_nouveau_private *dev_priv = dev->dev_private;
 122         struct nv04_fence_priv *priv;
 123         int ret;
 124
 125         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 126         if (!priv)
 127                 return -ENOMEM;
 128
 129         priv->base.engine.destroy = nv04_fence_destroy;
 130         priv->base.engine.init = nv04_fence_init;
 131         priv->base.engine.fini = nv04_fence_fini;
 132         priv->base.engine.context_new = nv04_fence_context_new;
 133         priv->base.engine.context_del = nv04_fence_context_del;
 134         priv->base.emit = nv04_fence_emit;
 135         priv->base.sync = nv04_fence_sync;
 136         priv->base.read = nv04_fence_read;
 137         dev_priv->eng[NVOBJ_ENGINE_FENCE] = &priv->base.engine;
 138         return ret;
 139 }