another large overhaul of interactions with userspace...

We need to keep a list of user created fbs to nuke on master exit.
We also need to use the bo properly.

1 files changed, 12 insertions, 0 deletions

diff --git a/shared-core/i915_dma.c b/shared-core/i915_dma.c
index 2b29dbe2..25172c1b 100644
--- a/shared-core/i915_dma.c
+++ b/shared-core/i915_dma.c
@@ -85,6 +85,8 @@ int i915_dma_cleanup(drm_device_t * dev)
 	 * may not have been called from userspace and after dev_private
 	 * is freed, it's too late.
 	 */
+	I915_WRITE(LP_RING + RING_LEN, 0);
+
 	if (dev->irq)
 		drm_irq_uninstall(dev);
 
@@ -97,6 +99,16 @@ static int i915_initialize(drm_device_t * dev,
 			   drm_i915_init_t * init)
 {
 
+	/* reset ring pointers */
+	I915_WRITE(LP_RING + RING_LEN, 0);
+	mb();
+
+	memset((void *)(dev_priv->ring.virtual_start), 0, dev_priv->ring.Size);
+
+	I915_WRITE(LP_RING + RING_START, dev_priv->ring.Start);
+	I915_WRITE(LP_RING + RING_LEN, ((dev_priv->ring.Size - 4096) & RING_NR_PAGES) | (RING_NO_REPORT | RING_VALID));
+
+
 	dev_priv->cpp = init->cpp;
 	dev_priv->sarea_priv->pf_current_page = 0;