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drm/nvc0: implement fencing

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Just simple REF_CNT fencing for the moment.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2010-11-24 10:30:22 +10:00
parent 96545299d7
commit 529c495912
1 changed files with 20 additions and 8 deletions
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28
drivers/gpu/drm/nouveau/nouveau_fence.c
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@ -32,7 +32,8 @@
#include "nouveau_dma.h"
#define USE_REFCNT(dev) (nouveau_private(dev)->chipset >= 0x10)
#define USE_SEMA(dev) (nouveau_private(dev)->chipset >= 0x17)
#define USE_SEMA(dev) (nouveau_private(dev)->chipset >= 0x17 && \
nouveau_private(dev)->card_type < NV_C0)
struct nouveau_fence {
struct nouveau_channel *channel;
@ -139,6 +140,7 @@ nouveau_fence_emit(struct nouveau_fence *fence)
{
struct nouveau_channel *chan = fence->channel;
struct drm_device *dev = chan->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
int ret;
ret = RING_SPACE(chan, 2);
@ -159,8 +161,15 @@ nouveau_fence_emit(struct nouveau_fence *fence)
list_add_tail(&fence->entry, &chan->fence.pending);
spin_unlock(&chan->fence.lock);
BEGIN_RING(chan, NvSubSw, USE_REFCNT(dev) ? 0x0050 : 0x0150, 1);
OUT_RING(chan, fence->sequence);
if (USE_REFCNT(dev)) {
if (dev_priv->card_type < NV_C0)
BEGIN_RING(chan, NvSubSw, 0x0050, 1);
else
BEGIN_NVC0(chan, 2, NvSubSw, 0x0050, 1);
} else {
BEGIN_RING(chan, NvSubSw, 0x0150, 1);
}
OUT_RING (chan, fence->sequence);
FIRE_RING(chan);
return 0;
@ -445,11 +454,14 @@ nouveau_fence_channel_init(struct nouveau_channel *chan)
if (ret)
return ret;
ret = RING_SPACE(chan, 2);
if (ret)
return ret;
BEGIN_RING(chan, NvSubSw, 0, 1);
OUT_RING(chan, NvSw);
/* we leave subchannel empty for nvc0 */
if (dev_priv->card_type < NV_C0) {
ret = RING_SPACE(chan, 2);
if (ret)
return ret;
BEGIN_RING(chan, NvSubSw, 0, 1);
OUT_RING(chan, NvSw);
}
/* Create a DMA object for the shared cross-channel sync area. */
if (USE_SEMA(dev)) {