i965/gs: Add a state atom to set up geometry shader state.

v2: Do not attempt to share the code that uploads
3DSTATE_BINDING_TABLE_POINTERS_GS, 3DSTATE_SAMPLER_STATE_POINTERS_GS,
or 3DSTATE_GS with VS.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

v3: Add _NEW_TRANSFORM to gen7_gs_state.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

1 files changed, 144 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/gen7_gs_state.c b/src/mesa/drivers/dri/i965/gen7_gs_state.c
new file mode 100644
index 0000000..3e3c331
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/gen7_gs_state.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "brw_context.h"
+#include "brw_state.h"
+#include "brw_defines.h"
+#include "intel_batchbuffer.h"
+
+
+static void
+gen7_upload_gs_push_constants(struct brw_context *brw)
+{
+   /* BRW_NEW_GEOMETRY_PROGRAM */
+   const struct brw_geometry_program *vp =
+      (struct brw_geometry_program *) brw->geometry_program;
+   if (!vp)
+      return;
+
+   /* CACHE_NEW_GS_PROG */
+   const struct brw_vec4_prog_data *prog_data = &brw->gs.prog_data->base;
+   struct brw_stage_state *stage_state = &brw->gs.base;
+
+   gen6_upload_vec4_push_constants(brw, &vp->program.Base, prog_data,
+                                   stage_state, AUB_TRACE_VS_CONSTANTS);
+}
+
+const struct brw_tracked_state gen7_gs_push_constants = {
+   .dirty = {
+      .mesa  = _NEW_TRANSFORM | _NEW_PROGRAM_CONSTANTS,
+      .brw   = (BRW_NEW_BATCH |
+		BRW_NEW_GEOMETRY_PROGRAM),
+      .cache = CACHE_NEW_GS_PROG,
+   },
+   .emit = gen7_upload_gs_push_constants,
+};
+
+
+static void
+upload_gs_state(struct brw_context *brw)
+{
+   const struct brw_stage_state *stage_state = &brw->gs.base;
+   const int max_threads_shift = brw->is_haswell ?
+      HSW_GS_MAX_THREADS_SHIFT : GEN6_GS_MAX_THREADS_SHIFT;
+   /* BRW_NEW_GEOMETRY_PROGRAM */
+   bool active = brw->geometry_program;
+   /* CACHE_NEW_GS_PROG */
+   const struct brw_vec4_prog_data *prog_data = &brw->gs.prog_data->base;
+
+   /* BRW_NEW_GS_BINDING_TABLE */
+   BEGIN_BATCH(2);
+   OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS_GS << 16 | (2 - 2));
+   OUT_BATCH(stage_state->bind_bo_offset);
+   ADVANCE_BATCH();
+
+   /* CACHE_NEW_SAMPLER */
+   BEGIN_BATCH(2);
+   OUT_BATCH(_3DSTATE_SAMPLER_STATE_POINTERS_GS << 16 | (2 - 2));
+   OUT_BATCH(stage_state->sampler_offset);
+   ADVANCE_BATCH();
+
+   gen7_upload_constant_state(brw, stage_state, active, _3DSTATE_CONSTANT_GS);
+
+   if (active) {
+      BEGIN_BATCH(7);
+      OUT_BATCH(_3DSTATE_GS << 16 | (7 - 2));
+      OUT_BATCH(stage_state->prog_offset);
+      OUT_BATCH(((ALIGN(stage_state->sampler_count, 4)/4) <<
+                 GEN6_GS_SAMPLER_COUNT_SHIFT));
+
+      if (brw->gs.prog_data->base.total_scratch) {
+         OUT_RELOC(stage_state->scratch_bo,
+                   I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
+                   ffs(brw->gs.prog_data->base.total_scratch) - 11);
+      } else {
+         OUT_BATCH(0);
+      }
+
+      OUT_BATCH(((brw->gs.prog_data->output_vertex_size_hwords * 2 - 1) <<
+                 GEN7_GS_OUTPUT_VERTEX_SIZE_SHIFT) |
+                (brw->gs.prog_data->output_topology <<
+                 GEN7_GS_OUTPUT_TOPOLOGY_SHIFT) |
+                (prog_data->urb_read_length <<
+                 GEN6_GS_URB_READ_LENGTH_SHIFT) |
+                (0 << GEN6_GS_URB_ENTRY_READ_OFFSET_SHIFT) |
+                (prog_data->dispatch_grf_start_reg <<
+                 GEN6_GS_DISPATCH_START_GRF_SHIFT));
+
+      OUT_BATCH(((brw->max_gs_threads - 1) << max_threads_shift) |
+                GEN7_GS_DISPATCH_MODE_DUAL_OBJECT |
+                GEN6_GS_STATISTICS_ENABLE |
+                GEN7_GS_ENABLE);
+
+      OUT_BATCH(0);
+      ADVANCE_BATCH();
+   } else {
+      BEGIN_BATCH(7);
+      OUT_BATCH(_3DSTATE_GS << 16 | (7 - 2));
+      OUT_BATCH(0); /* prog_bo */
+      OUT_BATCH((0 << GEN6_GS_SAMPLER_COUNT_SHIFT) |
+                (0 << GEN6_GS_BINDING_TABLE_ENTRY_COUNT_SHIFT));
+      OUT_BATCH(0); /* scratch space base offset */
+      OUT_BATCH((1 << GEN6_GS_DISPATCH_START_GRF_SHIFT) |
+                (0 << GEN6_GS_URB_READ_LENGTH_SHIFT) |
+                GEN7_GS_INCLUDE_VERTEX_HANDLES |
+                (0 << GEN6_GS_URB_ENTRY_READ_OFFSET_SHIFT));
+      OUT_BATCH((0 << GEN6_GS_MAX_THREADS_SHIFT) |
+                GEN6_GS_STATISTICS_ENABLE);
+      OUT_BATCH(0);
+      ADVANCE_BATCH();
+   }
+}
+
+const struct brw_tracked_state gen7_gs_state = {
+   .dirty = {
+      .mesa  = _NEW_TRANSFORM | _NEW_PROGRAM_CONSTANTS,
+      .brw   = (BRW_NEW_CONTEXT |
+                BRW_NEW_GEOMETRY_PROGRAM |
+                BRW_NEW_GS_BINDING_TABLE |
+                BRW_NEW_BATCH |
+                BRW_NEW_PUSH_CONSTANT_ALLOCATION),
+      .cache = CACHE_NEW_GS_PROG | CACHE_NEW_SAMPLER
+   },
+   .emit = upload_gs_state,
+};