drm/nouveau: Add getparam for current PTIMER time.

This will be useful for computing GPU-CPU latency, including GL_ARB_timer_query extension. Signed-off-by: Marcin Kościelnicki <koriakin@0x04.net> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
git-mirror · May 28, 2010 · 7fc74f1 · 7fc74f1
1 parent b334f2b
commit 7fc74f1
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Showing 2 changed files with 4 additions and 0 deletions.
diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -913,6 +913,9 @@ int nouveau_ioctl_getparam(struct drm_device *dev, void *data,
 	case NOUVEAU_GETPARAM_VM_VRAM_BASE:
 		getparam->value = dev_priv->vm_vram_base;
 		break;
+	case NOUVEAU_GETPARAM_PTIMER_TIME:
+		getparam->value = dev_priv->engine.timer.read(dev);
+		break;
 	case NOUVEAU_GETPARAM_GRAPH_UNITS:
 		/* NV40 and NV50 versions are quite different, but register
 		 * address is the same. User is supposed to know the card

diff --git a/include/drm/nouveau_drm.h b/include/drm/nouveau_drm.h
@@ -79,6 +79,7 @@ struct drm_nouveau_gpuobj_free {
 #define NOUVEAU_GETPARAM_CHIPSET_ID      11
 #define NOUVEAU_GETPARAM_VM_VRAM_BASE    12
 #define NOUVEAU_GETPARAM_GRAPH_UNITS     13
+#define NOUVEAU_GETPARAM_PTIMER_TIME     14
 struct drm_nouveau_getparam {
 	uint64_t param;
 	uint64_t value;