diff options
| author | Francisco Jerez <currojerez@riseup.net> | 2009-12-26 02:42:45 +0100 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2010-01-11 09:06:37 +1000 |
| commit | f03a314b4671407c4ff69a2d85e72413e8064c48 (patch) | |
| tree | be9db286225f6bce82cdbe776e4c5444413157fa /drivers/gpu/drm/nouveau/nouveau_dma.c | |
| parent | a510604df9444a2a1bdecafc048749e0f35816b5 (diff) | |
drm/nouveau: Allocate a per-channel instance of NV_SW.
It will be useful for various synchronization purposes, mostly stolen
from "[PATCH] drm/nv50: synchronize user channel after buffer object
move on kernel channel" by Maarten Maathuis.
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_dma.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_dma.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_dma.c b/drivers/gpu/drm/nouveau/nouveau_dma.c index 703553687b2..f1fd3f2b981 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dma.c +++ b/drivers/gpu/drm/nouveau/nouveau_dma.c @@ -35,6 +35,7 @@ nouveau_dma_init(struct nouveau_channel *chan) struct drm_device *dev = chan->dev; struct drm_nouveau_private *dev_priv = dev->dev_private; struct nouveau_gpuobj *m2mf = NULL; + struct nouveau_gpuobj *nvsw = NULL; int ret, i; /* Create NV_MEMORY_TO_MEMORY_FORMAT for buffer moves */ @@ -47,6 +48,15 @@ nouveau_dma_init(struct nouveau_channel *chan) if (ret) return ret; + /* Create an NV_SW object for various sync purposes */ + ret = nouveau_gpuobj_sw_new(chan, NV_SW, &nvsw); + if (ret) + return ret; + + ret = nouveau_gpuobj_ref_add(dev, chan, NvSw, nvsw, NULL); + if (ret) + return ret; + /* NV_MEMORY_TO_MEMORY_FORMAT requires a notifier object */ ret = nouveau_notifier_alloc(chan, NvNotify0, 32, &chan->m2mf_ntfy); if (ret) @@ -87,6 +97,13 @@ nouveau_dma_init(struct nouveau_channel *chan) BEGIN_RING(chan, NvSubM2MF, NV_MEMORY_TO_MEMORY_FORMAT_DMA_NOTIFY, 1); OUT_RING(chan, NvNotify0); + /* Initialise NV_SW */ + ret = RING_SPACE(chan, 2); + if (ret) + return ret; + BEGIN_RING(chan, NvSubSw, 0, 1); + OUT_RING(chan, NvSw); + /* Sit back and pray the channel works.. */ FIRE_RING(chan); |