drm/nvc0: implement fencing
Just simple REF_CNT fencing for the moment.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.c b/drivers/gpu/drm/nouveau/nouveau_fence.c
index 374a979..88b2f29 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fence.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fence.c
@@ -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 @@
{
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 @@
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 @@
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)) {