Mesa (master): intel: Take advantage of GL_READ_ONLY_ARB to map to GEM bo_map write flag.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: 4f4907d69f9020ce17aef21b6431d2dd65e01982
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=4f4907d69f9020ce17aef21b6431d2dd65e01982

Author: Eric Anholt <eric at anholt.net>
Date:   Wed Apr 22 16:24:42 2009 -0700

intel: Take advantage of GL_READ_ONLY_ARB to map to GEM bo_map write flag.

This is a CPU win in general, but in particular reduces the pain of
Mesa's calculation of min/max indices in DrawElements (wtf?).

---

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

diff --git a/src/mesa/drivers/dri/i965/brw_curbe.c b/src/mesa/drivers/dri/i965/brw_curbe.c
index 18b187e..0337156 100644
--- a/src/mesa/drivers/dri/i965/brw_curbe.c
+++ b/src/mesa/drivers/dri/i965/brw_curbe.c
@@ -353,10 +353,10 @@ update_constant_buffer(struct brw_context *brw,
       assert(const_buffer);
       assert(const_buffer->size >= size);
 
-      dri_bo_map(const_buffer, GL_TRUE);
+      drm_intel_gem_bo_map_gtt(const_buffer);
       map = const_buffer->virtual;
       memcpy(map, params->ParameterValues, size);
-      dri_bo_unmap(const_buffer);
+      drm_intel_gem_bo_unmap_gtt(const_buffer);
 
       if (0) {
          int i;
diff --git a/src/mesa/drivers/dri/intel/intel_buffer_objects.c b/src/mesa/drivers/dri/intel/intel_buffer_objects.c
index b7c7eeb..c849e48 100644
--- a/src/mesa/drivers/dri/intel/intel_buffer_objects.c
+++ b/src/mesa/drivers/dri/intel/intel_buffer_objects.c
@@ -204,9 +204,8 @@ intel_bufferobj_map(GLcontext * ctx,
 {
    struct intel_context *intel = intel_context(ctx);
    struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
+   GLboolean read_only = (access == GL_READ_ONLY_ARB);
 
-   /* XXX: Translate access to flags arg below:
-    */
    assert(intel_obj);
 
    if (intel_obj->region)
@@ -217,7 +216,7 @@ intel_bufferobj_map(GLcontext * ctx,
       return NULL;
    }
 
-   dri_bo_map(intel_obj->buffer, GL_TRUE);
+   dri_bo_map(intel_obj->buffer, !read_only);
    obj->Pointer = intel_obj->buffer->virtual;
    return obj->Pointer;
 }