apfs/linux-apfs
0
0
Fork 0
mirror of https://github.com/linux-apfs/linux-apfs.git synced 2026-05-01 15:00:59 -07:00
Code Issues Packages Projects Releases Wiki Activity

drm/i915/ringbuffer: Make IRQ refcnting atomic

Browse Source 
In order to enforce the correct memory barriers for irq get/put, we need
to perform the actual counting using atomic operations.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson
2010-12-13 16:54:50 +00:00
parent 8d5203ca62
commit b13c2b96bf
4 changed files with 56 additions and 46 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/gpu/drm/i915/i915_irq.c
+9 -8
View File
@@ -1186,10 +1186,9 @@ void i915_trace_irq_get(struct drm_device *dev, u32 seqno)
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
struct intel_ring_buffer *ring = LP_RING(dev_priv);
if (dev_priv->trace_irq_seqno == 0)
ring->irq_get(ring);
dev_priv->trace_irq_seqno = seqno;
if (dev_priv->trace_irq_seqno == 0 &&
ring->irq_get(ring))
dev_priv->trace_irq_seqno = seqno;
}
static int i915_wait_irq(struct drm_device * dev, int irq_nr)
@@ -1211,10 +1210,12 @@ static int i915_wait_irq(struct drm_device * dev, int irq_nr)
if (master_priv->sarea_priv)
master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
ring->irq_get(ring);
DRM_WAIT_ON(ret, ring->irq_queue, 3 * DRM_HZ,
READ_BREADCRUMB(dev_priv) >= irq_nr);
ring->irq_put(ring);
ret = -ENODEV;
if (ring->irq_get(ring)) {
DRM_WAIT_ON(ret, ring->irq_queue, 3 * DRM_HZ,
READ_BREADCRUMB(dev_priv) >= irq_nr);
ring->irq_put(ring);
}
if (ret == -EBUSY) {
DRM_ERROR("EBUSY -- rec: %d emitted: %d\n",