Mesa (master): intel: Require kernel 2.6.39 for relaxed relocation support.

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: 394edb5af5161f664c0c3b4eaba9be4e30f3c138
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=394edb5af5161f664c0c3b4eaba9be4e30f3c138

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Fri Apr  5 23:59:52 2013 -0700

intel: Require kernel 2.6.39 for relaxed relocation support.

Chris Wilson's relaxed relocation patch landed in March 2011.  Anyone
running pre-3.0 kernels probably isn't going to get the latest Mesa
anyway.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
Reviewed-by: Eric Anholt <eric at anholt.net>

---

 src/mesa/drivers/dri/i965/brw_draw_upload.c |    2 --
 src/mesa/drivers/dri/intel/intel_screen.c   |    7 ++++---
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_draw_upload.c b/src/mesa/drivers/dri/i965/brw_draw_upload.c
index 07f9f00..d2451f9 100644
--- a/src/mesa/drivers/dri/i965/brw_draw_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_draw_upload.c
@@ -517,8 +517,6 @@ static void brw_prepare_vertices(struct brw_context *brw)
       brw->vb.start_vertex_bias = -delta;
       delta = 0;
    }
-   if (delta && !brw->intel.intelScreen->relaxed_relocations)
-      min_index = delta = 0;
 
    /* Handle any arrays to be uploaded. */
    if (nr_uploads > 1) {
diff --git a/src/mesa/drivers/dri/intel/intel_screen.c b/src/mesa/drivers/dri/intel/intel_screen.c
index 3ca10c8..eb451ba 100644
--- a/src/mesa/drivers/dri/intel/intel_screen.c
+++ b/src/mesa/drivers/dri/intel/intel_screen.c
@@ -1008,9 +1008,10 @@ intel_init_bufmgr(struct intel_screen *intelScreen)
 
    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 
-   intelScreen->relaxed_relocations = 0;
-   intelScreen->relaxed_relocations |=
-      intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
+   if (!intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA)) {
+      fprintf(stderr, "[%s: %u] Kernel 2.6.39 required.\n", __func__, __LINE__);
+      return false;
+   }
 
    return true;
 }