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Intel handled the management of the breadcrumb counter inconsistently.

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Make sure that we always handle it the same way.

MFC after:	3 days
This commit is contained in:
Robert Noland 2009-03-25 01:44:16 +00:00
parent eccb3bb8f6
commit a13575a303
2 changed files with 12 additions and 11 deletions
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8
sys/dev/drm/i915_dma.c
View File

@ -439,8 +439,7 @@ static void i915_emit_breadcrumb(struct drm_device *dev)
drm_i915_private_t *dev_priv = dev->dev_private;
RING_LOCALS;
dev_priv->counter++;
if (dev_priv->counter > 0x7FFFFFFFUL)
if (++dev_priv->counter > 0x7FFFFFFFUL)
dev_priv->counter = 0;
if (dev_priv->sarea_priv)
dev_priv->sarea_priv->last_enqueue = dev_priv->counter;
@ -574,7 +573,10 @@ static int i915_dispatch_flip(struct drm_device * dev)
OUT_RING(0);
ADVANCE_LP_RING();
dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
if (++dev_priv->counter > 0x7FFFFFFFUL)
dev_priv->counter = 0;
if (dev_priv->sarea_priv)
dev_priv->sarea_priv->last_enqueue = dev_priv->counter;
BEGIN_LP_RING(4);
OUT_RING(MI_STORE_DWORD_INDEX);

15
sys/dev/drm/i915_irq.c
View File

@ -284,14 +284,13 @@ static int i915_emit_irq(struct drm_device * dev)
i915_kernel_lost_context(dev);
DRM_DEBUG("\n");
dev_priv->counter++;
if (dev_priv->counter > 0x7FFFFFFFUL)
dev_priv->counter = 1;
if (++dev_priv->counter > 0x7FFFFFFFUL)
dev_priv->counter = 0;
if (dev_priv->sarea_priv)
dev_priv->sarea_priv->last_enqueue = dev_priv->counter;
DRM_DEBUG("emitting: %d\n", dev_priv->counter);
BEGIN_LP_RING(4);
OUT_RING(MI_STORE_DWORD_INDEX);
OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
@ -331,9 +330,6 @@ static int i915_wait_irq(struct drm_device * dev, int irq_nr)
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int ret = 0;
DRM_DEBUG("irq_nr=%d breadcrumb=%d\n", irq_nr,
READ_BREADCRUMB(dev_priv));
if (READ_BREADCRUMB(dev_priv) >= irq_nr) {
if (dev_priv->sarea_priv) {
dev_priv->sarea_priv->last_dispatch =
@ -345,6 +341,9 @@ static int i915_wait_irq(struct drm_device * dev, int irq_nr)
if (dev_priv->sarea_priv)
dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
DRM_DEBUG("irq_nr=%d breadcrumb=%d\n", irq_nr,
READ_BREADCRUMB(dev_priv));
i915_user_irq_get(dev);
DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ,
READ_BREADCRUMB(dev_priv) >= irq_nr);