i965: Use GTT maps when available to upload vertex arrays and system VBOs.

This speeds up OA on my GM45 by 21% (more than the original CPU cost of
the upload path).  We might still be able to squeeze a few more percent out
by avoiding repeatedly mapping/unmapping buffers as we upload elements into
them.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_screen.c b/src/mesa/drivers/dri/intel/intel_screen.c
index 752195aa35..65e62947ef 100644
--- a/src/mesa/drivers/dri/intel/intel_screen.c
+++ b/src/mesa/drivers/dri/intel/intel_screen.c
@@ -563,6 +563,7 @@ intel_init_bufmgr(intelScreenPrivate *intelScreen)
    GLboolean gem_supported;
    struct drm_i915_getparam gp;
    __DRIscreenPrivate *spriv = intelScreen->driScrnPriv;
+   int num_fences;
 
    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
 
@@ -613,6 +614,11 @@ intel_init_bufmgr(intelScreenPrivate *intelScreen)
 				&intelScreen->sarea->last_dispatch);
    }
 
+   if (intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences))
+      intelScreen->kernel_exec_fencing = !!num_fences;
+   else
+      intelScreen->kernel_exec_fencing = GL_FALSE;
+
    return GL_TRUE;
 }