diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nv04_fence.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nv04_fence.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nv04_fence.c b/drivers/gpu/drm/nouveau/nv04_fence.c new file mode 100644 index 000000000000..abe89db6de24 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nv04_fence.c @@ -0,0 +1,140 @@ +/* + * Copyright 2012 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Ben Skeggs + */ + +#include "drmP.h" +#include "nouveau_drv.h" +#include "nouveau_dma.h" +#include "nouveau_ramht.h" +#include "nouveau_fence.h" + +struct nv04_fence_chan { + struct nouveau_fence_chan base; + atomic_t sequence; +}; + +struct nv04_fence_priv { + struct nouveau_fence_priv base; +}; + +static int +nv04_fence_emit(struct nouveau_fence *fence) +{ + struct nouveau_channel *chan = fence->channel; + int ret = RING_SPACE(chan, 2); + if (ret == 0) { + BEGIN_NV04(chan, NvSubSw, 0x0150, 1); + OUT_RING (chan, fence->sequence); + FIRE_RING (chan); + } + return ret; +} + +static int +nv04_fence_sync(struct nouveau_fence *fence, + struct nouveau_channel *prev, struct nouveau_channel *chan) +{ + return -ENODEV; +} + +int +nv04_fence_mthd(struct nouveau_channel *chan, u32 class, u32 mthd, u32 data) +{ + struct nv04_fence_chan *fctx = chan->engctx[NVOBJ_ENGINE_FENCE]; + atomic_set(&fctx->sequence, data); + return 0; +} + +static u32 +nv04_fence_read(struct nouveau_channel *chan) +{ + struct nv04_fence_chan *fctx = chan->engctx[NVOBJ_ENGINE_FENCE]; + return atomic_read(&fctx->sequence); +} + +static void +nv04_fence_context_del(struct nouveau_channel *chan, int engine) +{ + struct nv04_fence_chan *fctx = chan->engctx[engine]; + nouveau_fence_context_del(&fctx->base); + chan->engctx[engine] = NULL; + kfree(fctx); +} + +static int +nv04_fence_context_new(struct nouveau_channel *chan, int engine) +{ + struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL); + if (fctx) { + nouveau_fence_context_new(&fctx->base); + atomic_set(&fctx->sequence, 0); + chan->engctx[engine] = fctx; + return 0; + } + return -ENOMEM; +} + +static int +nv04_fence_fini(struct drm_device *dev, int engine, bool suspend) +{ + return 0; +} + +static int +nv04_fence_init(struct drm_device *dev, int engine) +{ + return 0; +} + +static void +nv04_fence_destroy(struct drm_device *dev, int engine) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nv04_fence_priv *priv = nv_engine(dev, engine); + + dev_priv->eng[engine] = NULL; + kfree(priv); +} + +int +nv04_fence_create(struct drm_device *dev) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nv04_fence_priv *priv; + int ret; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->base.engine.destroy = nv04_fence_destroy; + priv->base.engine.init = nv04_fence_init; + priv->base.engine.fini = nv04_fence_fini; + priv->base.engine.context_new = nv04_fence_context_new; + priv->base.engine.context_del = nv04_fence_context_del; + priv->base.emit = nv04_fence_emit; + priv->base.sync = nv04_fence_sync; + priv->base.read = nv04_fence_read; + dev_priv->eng[NVOBJ_ENGINE_FENCE] = &priv->base.engine; + return ret; +} |