i965/gen7: Call gen7_create_constant_surface instead of brw_[...].

Fixes 17 piglit tests:
- glsl-vs-arrays-3
- glsl-vs-texturematrix-2
- glsl-vs-uniform-array-2
- arl
- nv-arl
- nv-init-zero-addr
- vp-address-01
- vp-arl-constant-array
- vp-arl-constant-array-huge
- vp-arl-constant-array-huge-offset
- vp-arl-constant-array-huge-offset-neg
- vp-arl-constant-array-huge-relative-offset
- vp-arl-constant-array-huge-varying
- vp-arl-env-array
- vp-arl-local-array
- vp-arl-neg-array
- vp-arl-neg-array-2

Fixes 4 glean tests:
- glsl1-constant array of vec4 with variable indexing, vertex shader
- glsl1-constant array with variable indexing, vertex shader
- glsl1-constant array with variable indexing, vertex shader (2)
- vp1-ARL test

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>

src/mesa/drivers/dri/i965/brw_state.h

@@ -191,6 +191,12 @@ GLuint translate_tex_format(gl_format mesa_format,
 			    GLenum depth_mode,
 			    GLenum srgb_decode);
 
+/* gen7_wm_surface_state.c */
+void gen7_create_constant_surface(struct brw_context *brw,
+				  drm_intel_bo *bo,
+				  int width,
+				  uint32_t *out_offset);
+
 /* brw_wm_sampler_state.c */
 uint32_t translate_wrap_mode(GLenum wrap, bool using_nearest);
 void upload_default_color(struct brw_context *brw,

src/mesa/drivers/dri/i965/brw_vs_surface_state.c

@@ -114,6 +114,7 @@ brw_update_vs_constant_surface( struct gl_context *ctx,
                                 GLuint surf)
 {
    struct brw_context *brw = brw_context(ctx);
+   struct intel_context *intel = &brw->intel;
    struct brw_vertex_program *vp =
       (struct brw_vertex_program *) brw->vertex_program;
    const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
@@ -128,8 +129,13 @@ brw_update_vs_constant_surface( struct gl_context *ctx,
       return;
    }
 
-   brw_create_constant_surface(brw, brw->vs.const_bo, params->NumParameters,
-			       &brw->vs.surf_offset[surf]);
+   if (intel->gen >= 7) {
+      gen7_create_constant_surface(brw, brw->vs.const_bo, params->NumParameters,
+				  &brw->vs.surf_offset[surf]);
+   } else {
+      brw_create_constant_surface(brw, brw->vs.const_bo, params->NumParameters,
+				  &brw->vs.surf_offset[surf]);
+   }
 }
 
 

src/mesa/drivers/dri/i965/gen7_wm_surface_state.c

@@ -126,7 +126,7 @@ gen7_update_texture_surface(struct gl_context *ctx, GLuint unit)
  * Create the constant buffer surface.  Vertex/fragment shader constants will
  * be read from this buffer with Data Port Read instructions/messages.
  */
-static void
+void
 gen7_create_constant_surface(struct brw_context *brw,
 			     drm_intel_bo *bo,
 			     int width,