[intel] Enable buffer re-use for gem

Use the new DRM_IOCTL_I915_GEM_BUSY ioctl to detect
idle buffers for re-use.

diff --git a/src/mesa/drivers/dri/intel/intel_bufmgr_gem.c b/src/mesa/drivers/dri/intel/intel_bufmgr_gem.c
index 8638d0af1a5b58ef41249676a666df7961e645b6..f561b71ebbdda06c8534309008821a11ef3b4f90 100644 (file)
--- a/src/mesa/drivers/dri/intel/intel_bufmgr_gem.c
+++ b/src/mesa/drivers/dri/intel/intel_bufmgr_gem.c
@@ -293,16 +293,11 @@ dri_gem_bo_alloc(dri_bufmgr *bufmgr, const char *name,
     /* Get a buffer out of the cache if available */
     if (bucket != NULL && bucket->num_entries > 0) {
        struct dri_gem_bo_bucket_entry *entry = bucket->head;
-#if 0
-       int busy;
-
-       /* XXX */
-       /* Check if the buffer is still in flight.  If not, reuse it. */
-       ret = drmBOBusy(bufmgr_gem->fd, &entry->drm_bo, &busy);
-       alloc_from_cache = (ret == 0 && busy == 0);
-#else
-       alloc_from_cache = 0;
-#endif
+       struct drm_i915_gem_busy busy;
+       
+        busy.handle = entry->gem_handle;
+        ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_BUSY, &busy);
+        alloc_from_cache = (ret == 0 && busy.busy == 0);
 
        if (alloc_from_cache) {
            bucket->head = entry->next;
@@ -797,14 +792,12 @@ dri_gem_post_submit(dri_bo *batch_buf)
 void
 intel_gem_enable_bo_reuse(dri_bufmgr *bufmgr)
 {
-    /*
     dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bufmgr;
     int i;
 
     for (i = 0; i < INTEL_GEM_BO_BUCKETS; i++) {
        bufmgr_gem->cache_bucket[i].max_entries = -1;
     }
-    */
 }
 
 /*