+ GLcontext *ctx = &intel->ctx;
+ const struct brw_vertex_program *vp =
+ brw_vertex_program_const(brw->vertex_program);
+ unsigned int nr_params = vp->program.Base.Parameters->NumParameters;
+ drm_intel_bo *constant_bo;
+ int i;
+
+ if (vp->use_const_buffer || nr_params == 0) {
+ /* Disable the push constant buffers. */
+ BEGIN_BATCH(5);
+ OUT_BATCH(CMD_3D_CONSTANT_VS_STATE << 16 | (5 - 2));
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ ADVANCE_BATCH();
+ } else {
+ if (brw->vertex_program->IsNVProgram)
+ _mesa_load_tracked_matrices(ctx);
+
+ /* Updates the ParamaterValues[i] pointers for all parameters of the
+ * basic type of PROGRAM_STATE_VAR.
+ */
+ _mesa_load_state_parameters(ctx, vp->program.Base.Parameters);
+
+ constant_bo = drm_intel_bo_alloc(intel->bufmgr, "VS constant_bo",
+ nr_params * 4 * sizeof(float),
+ 4096);
+ drm_intel_gem_bo_map_gtt(constant_bo);
+ for (i = 0; i < nr_params; i++) {
+ memcpy((char *)constant_bo->virtual + i * 4 * sizeof(float),
+ vp->program.Base.Parameters->ParameterValues[i],
+ 4 * sizeof(float));
+ }
+ drm_intel_gem_bo_unmap_gtt(constant_bo);
+
+ BEGIN_BATCH(5);
+ OUT_BATCH(CMD_3D_CONSTANT_VS_STATE << 16 |
+ GEN6_CONSTANT_BUFFER_0_ENABLE |
+ (5 - 2));
+ OUT_RELOC(constant_bo,
+ I915_GEM_DOMAIN_RENDER, 0, /* XXX: bad domain */
+ ALIGN(nr_params, 2) / 2 - 1);
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ ADVANCE_BATCH();
+
+ drm_intel_bo_unreference(constant_bo);
+ }
+
+ intel_batchbuffer_emit_mi_flush(intel->batch);