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i915: Track progress inside of batchbuffers for determining wedgedness.

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This avoids early termination for long-running commands.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Keith Packard 2008-07-30 12:21:20 -07:00 committed by Dave Airlie
parent ed4cb4142b
commit d3a6d4467c
1 changed files with 10 additions and 1 deletions
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11
drivers/gpu/drm/i915/i915_dma.c
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@ -40,11 +40,15 @@ int i915_wait_ring(struct drm_device * dev, int n, const char *caller)
{
drm_i915_private_t *dev_priv = dev->dev_private;
drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
u32 acthd_reg = IS_I965G(dev) ? ACTHD_I965 : ACTHD;
u32 last_acthd = I915_READ(acthd_reg);
u32 acthd;
u32 last_head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
int i;
for (i = 0; i < 10000; i++) {
for (i = 0; i < 100000; i++) {
ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
acthd = I915_READ(acthd_reg);
ring->space = ring->head - (ring->tail + 8);
if (ring->space < 0)
ring->space += ring->Size;
@ -55,8 +59,13 @@ int i915_wait_ring(struct drm_device * dev, int n, const char *caller)
if (ring->head != last_head)
i = 0;
if (acthd != last_acthd)
i = 0;
last_head = ring->head;
last_acthd = acthd;
msleep_interruptible(10);
}
return -EBUSY;