LXR linux/drivers/gpu/drm/nouveau/nv04

   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
  31struct nv04_fence_chan {
  32        struct nouveau_fence_chan base;
  33        atomic_t sequence;
  34};
  35
  36struct nv04_fence_priv {
  37        struct nouveau_fence_priv base;
  38};
  39
  40static int
  41nv04_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
  53static int
  54nv04_fence_sync(struct nouveau_fence *fence,
  55                struct nouveau_channel *prev, struct nouveau_channel *chan)
  56{
  57        return -ENODEV;
  58}
  59
  60int
  61nv04_fence_mthd(struct nouveau_channel *chan, u32 class, u32 mthd, u32 data)
  62{
  63        struct nv04_fence_chan *fctx = chan->engctx[NVOBJ_ENGINE_FENCE];
  64        atomic_set(&fctx->sequence, data);
  65        return 0;
  66}
  67
  68static u32
  69nv04_fence_read(struct nouveau_channel *chan)
  70{
  71        struct nv04_fence_chan *fctx = chan->engctx[NVOBJ_ENGINE_FENCE];
  72        return atomic_read(&fctx->sequence);
  73}
  74
  75static void
  76nv04_fence_context_del(struct nouveau_channel *chan, int engine)
  77{
  78        struct nv04_fence_chan *fctx = chan->engctx[engine];
  79        nouveau_fence_context_del(&fctx->base);
  80        chan->engctx[engine] = NULL;
  81        kfree(fctx);
  82}
  83
  84static int
  85nv04_fence_context_new(struct nouveau_channel *chan, int engine)
  86{
  87        struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);
  88        if (fctx) {
  89                nouveau_fence_context_new(&fctx->base);
  90                atomic_set(&fctx->sequence, 0);
  91                chan->engctx[engine] = fctx;
  92                return 0;
  93        }
  94        return -ENOMEM;
  95}
  96
  97static int
  98nv04_fence_fini(struct drm_device *dev, int engine, bool suspend)
  99{
 100        return 0;
 101}
 102
 103static int
 104nv04_fence_init(struct drm_device *dev, int engine)
 105{
 106        return 0;
 107}
 108
 109static void
 110nv04_fence_destroy(struct drm_device *dev, int engine)
 111{
 112        struct drm_nouveau_private *dev_priv = dev->dev_private;
 113        struct nv04_fence_priv *priv = nv_engine(dev, engine);
 114
 115        dev_priv->eng[engine] = NULL;
 116        kfree(priv);
 117}
 118
 119int
 120nv04_fence_create(struct drm_device *dev)
 121{
 122        struct drm_nouveau_private *dev_priv = dev->dev_private;
 123        struct nv04_fence_priv *priv;
 124        int ret;
 125
 126        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 127        if (!priv)
 128                return -ENOMEM;
 129
 130        priv->base.engine.destroy = nv04_fence_destroy;
 131        priv->base.engine.init = nv04_fence_init;
 132        priv->base.engine.fini = nv04_fence_fini;
 133        priv->base.engine.context_new = nv04_fence_context_new;
 134        priv->base.engine.context_del = nv04_fence_context_del;
 135        priv->base.emit = nv04_fence_emit;
 136        priv->base.sync = nv04_fence_sync;
 137        priv->base.read = nv04_fence_read;
 138        dev_priv->eng[NVOBJ_ENGINE_FENCE] = &priv->base.engine;
 139        return ret;
 140}
 141