[Mesa-dev] [PATCH 14/23] i965: Introduce a brw_vue_prog_data::include_vue_handles flag.

[Kenneth Graunke]

Tessellation shaders and SIMD8 geometry shaders may need to resort to
the pull model for inputs at times.  When set, the state upload code
will tell the hardware to provide URB handles for input data.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/drivers/dri/i965/brw_context.h   | 3 +++
 src/mesa/drivers/dri/i965/gen8_gs_state.c | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index 414a9f1..e84fed0 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -699,6 +699,9 @@ struct brw_vue_prog_data {
    struct brw_stage_prog_data base;
    struct brw_vue_map vue_map;
 
+   /** Should the hardware deliver input VUE handles for URB pull loads? */
+   bool include_vue_handles;
+
    GLuint urb_read_length;
    GLuint total_grf;
 
diff --git a/src/mesa/drivers/dri/i965/gen8_gs_state.c b/src/mesa/drivers/dri/i965/gen8_gs_state.c
index 4195f4c..e380109 100644
--- a/src/mesa/drivers/dri/i965/gen8_gs_state.c
+++ b/src/mesa/drivers/dri/i965/gen8_gs_state.c
@@ -70,6 +70,8 @@ gen8_upload_gs_state(struct brw_context *brw)
                  GEN7_GS_OUTPUT_VERTEX_SIZE_SHIFT) |
                 (brw->gs.prog_data->output_topology <<
                  GEN7_GS_OUTPUT_TOPOLOGY_SHIFT) |
+                (prog_data->include_vue_handles ?
+                 GEN7_GS_INCLUDE_VERTEX_HANDLES : 0) |
                 (prog_data->urb_read_length <<
                  GEN6_GS_URB_READ_LENGTH_SHIFT) |
                 (0 << GEN6_GS_URB_ENTRY_READ_OFFSET_SHIFT) |
-- 
2.5.3