Incorporates a similar patch by Daniel Vetter, the alteration being to
report the current busy state after retiring.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc : Daniel Vetter <daniel.vet...@ffwll.ch>
---
drivers/gpu/drm/i915/i915_gem.c | 40 +++++++++++++++++++++++++-------------
1 files changed, 26 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index f599d77..909e727 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4163,22 +4163,34 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data,
}
mutex_lock(&dev->struct_mutex);
- /* Update the active list for the hardware's current position.
- * Otherwise this only updates on a delayed timer or when irqs are
- * actually unmasked, and our working set ends up being larger than
- * required.
- */
- i915_gem_retire_requests(dev);
- obj_priv = to_intel_bo(obj);
- /* Don't count being on the flushing list against the object being
- * done. Otherwise, a buffer left on the flushing list but not getting
- * flushed (because nobody's flushing that domain) won't ever return
- * unbusy and get reused by libdrm's bo cache. The other expected
- * consumer of this interface, OpenGL's occlusion queries, also specs
- * that the objects get unbusy "eventually" without any interference.
+ /* Count all active objects as busy, even if they are currently not used
+ * by the gpu. Users of this interface expect objects to eventually
+ * become non-busy without any further actions, therefore emit any
+ * necessary flushes here.
*/
- args->busy = obj_priv->active && obj_priv->last_rendering_seqno != 0;
+ obj_priv = to_intel_bo(obj);
+ args->busy = obj_priv->active;
+ if (args->busy) {
+ /* Unconditionally flush objects, even when the gpu still uses
this
+ * object. Userspace calling this function indicates that it
wants to
+ * use this buffer rather sooner than later, so issuing the
required
+ * flush earlier is beneficial.
+ */
+ if (obj->write_domain) {
+ i915_gem_flush(dev, 0, obj->write_domain);
+ (void)i915_add_request(dev, file_priv,
obj->write_domain, obj_priv->ring);
+ }
+
+ /* Update the active list for the hardware's current position.
+ * Otherwise this only updates on a delayed timer or when irqs
+ * are actually unmasked, and our working set ends up being
+ * larger than required.
+ */
+ i915_gem_retire_requests_ring(dev, obj_priv->ring);
+
+ args->busy = obj_priv->active;
+ }
drm_gem_object_unreference(obj);
mutex_unlock(&dev->struct_mutex);
--
1.7.1
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