[Mesa-dev] [PATCH 3/4] i965: Add new brw_context::max_gs_threads constant.

[Kenneth Graunke]

These are correct to the best of my knowledge, gleaned from a variety of
internal sources.  Sadly, the Sandybridge PRM has incorrect limits.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/drivers/dri/i965/brw_context.c |    7 +++++++
 src/mesa/drivers/dri/i965/brw_context.h |    1 +
 2 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 661b14f..d2400b9 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -192,12 +192,14 @@ brwCreateContext(int api,
       if (intel->gt == 1) {
 	 brw->max_wm_threads = 86;
 	 brw->max_vs_threads = 36;
+	 brw->max_gs_threads = 36;
 	 brw->urb.size = 128;
 	 brw->urb.max_vs_entries = 512;
 	 brw->urb.max_gs_entries = 192;
       } else if (intel->gt == 2) {
 	 brw->max_wm_threads = 86;
 	 brw->max_vs_threads = 128;
+	 brw->max_gs_threads = 128;
 	 brw->urb.size = 256;
 	 brw->urb.max_vs_entries = 704;
 	 brw->urb.max_gs_entries = 320;
@@ -212,25 +214,30 @@ brwCreateContext(int api,
 	  */
 	 brw->max_wm_threads = 40;
 	 brw->max_vs_threads = 60;
+	 brw->max_gs_threads = 60;
 	 brw->urb.size = 64;            /* volume 5c.5 section 5.1 */
 	 brw->urb.max_vs_entries = 256; /* volume 2a (see 3DSTATE_URB) */
       } else {
 	 brw->max_wm_threads = 40;
 	 brw->max_vs_threads = 24;
+	 brw->max_gs_threads = 21; /* conservative; 24 if rendering disabled */
 	 brw->urb.size = 32;            /* volume 5c.5 section 5.1 */
 	 brw->urb.max_vs_entries = 128; /* volume 2a (see 3DSTATE_URB) */
       }
    } else if (intel->gen == 5) {
       brw->urb.size = 1024;
       brw->max_vs_threads = 72;
+      brw->max_gs_threads = 32;
       brw->max_wm_threads = 12 * 6;
    } else if (intel->is_g4x) {
       brw->urb.size = 384;
       brw->max_vs_threads = 32;
+      brw->max_gs_threads = 2;
       brw->max_wm_threads = 10 * 5;
    } else if (intel->gen < 6) {
       brw->urb.size = 256;
       brw->max_vs_threads = 16;
+      brw->max_gs_threads = 2;
       brw->max_wm_threads = 8 * 4;
       brw->has_negative_rhw_bug = true;
    }
diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index f19bf31..ff25b09 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -672,6 +672,7 @@ struct brw_context
     * for each pipeline stage.
     */
    int max_vs_threads;
+   int max_gs_threads;
    int max_wm_threads;
 
    /* BRW_NEW_URB_ALLOCATIONS:
-- 
1.7.7