i965: Add ARB_get_program_binary support using nir_serialization

This resolves an apparent game bug described in 85564. The game
doesn't properly handle ARB_get_program_binary with 0 supported
formats.

V2 (Timothy Arceri):
 - less driver code as more has been moved into the common helpers.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=85564
Signed-off-by: Timothy Arceri <tarceri@itsqueeze.com>
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com> (v1)
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

src/mesa/drivers/dri/i965/Makefile.sources

@@ -38,6 +38,7 @@ i965_FILES = \
 	brw_performance_query.c \
 	brw_program.c \
 	brw_program.h \
+	brw_program_binary.c \
 	brw_program_cache.c \
 	brw_primitive_restart.c \
 	brw_queryobj.c \

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

@@ -329,6 +329,13 @@ brw_init_driver_functions(struct brw_context *brw,
 
    if (devinfo->gen >= 6)
       functions->GetSamplePosition = gen6_get_sample_position;
+
+   /* GL_ARB_get_program_binary */
+   brw_program_binary_init(brw->screen->deviceID);
+   functions->GetProgramBinaryDriverSHA1 = brw_get_program_binary_driver_sha1;
+   functions->ProgramBinarySerializeDriverBlob = brw_program_serialize_nir;
+   functions->ProgramBinaryDeserializeDriverBlob =
+      brw_deserialize_program_binary;
 }
 
 static void
@@ -696,6 +703,9 @@ brw_initialize_context_constants(struct brw_context *brw)
 
    if (!(ctx->Const.ContextFlags & GL_CONTEXT_FLAG_DEBUG_BIT))
       ctx->Const.AllowMappedBuffersDuringExecution = true;
+
+   /* GL_ARB_get_program_binary */
+   ctx->Const.NumProgramBinaryFormats = 1;
 }
 
 static void

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

@@ -1579,6 +1579,21 @@ brw_check_for_reset(struct brw_context *brw);
 extern void
 brw_init_compute_functions(struct dd_function_table *functions);
 
+/* brw_program_binary.c */
+extern void
+brw_program_binary_init(unsigned device_id);
+extern void
+brw_get_program_binary_driver_sha1(struct gl_context *ctx, uint8_t *sha1);
+extern void
+brw_deserialize_program_binary(struct gl_context *ctx,
+                               struct gl_shader_program *shProg,
+                               struct gl_program *prog);
+void
+brw_program_serialize_nir(struct gl_context *ctx, struct gl_program *prog);
+void
+brw_program_deserialize_nir(struct gl_context *ctx, struct gl_program *prog,
+                            gl_shader_stage stage);
+
 /*======================================================================
  * Inline conversion functions.  These are better-typed than the
  * macros used previously:

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

@@ -81,12 +81,6 @@ brw_assign_common_binding_table_offsets(const struct gen_device_info *devinfo,
                                         struct brw_stage_prog_data *stage_prog_data,
                                         uint32_t next_binding_table_offset);
 
-void
-brw_program_serialize_nir(struct gl_context *ctx, struct gl_program *prog);
-void
-brw_program_deserialize_nir(struct gl_context *ctx, struct gl_program *prog,
-                            gl_shader_stage stage);
-
 void
 brw_stage_prog_data_free(const void *prog_data);
 

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

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2017 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 <stdint.h>
+
+#include "util/build_id.h"
+#include "util/mesa-sha1.h"
+
+#include "brw_context.h"
+#include "brw_program.h"
+
+static uint8_t driver_sha1[20];
+
+void
+brw_program_binary_init(unsigned device_id)
+{
+   const struct build_id_note *note =
+      build_id_find_nhdr_for_addr(brw_program_binary_init);
+   assert(note);
+
+   /**
+    * With Mesa's megadrivers, taking the sha1 of i965_dri.so may not be
+    * unique. Therefore, we make a sha1 of the "i965" string and the sha1
+    * build id from i965_dri.so.
+    */
+   struct mesa_sha1 ctx;
+   _mesa_sha1_init(&ctx);
+   char renderer[10];
+   assert(device_id < 0x10000);
+   int len = snprintf(renderer, sizeof(renderer), "i965_%04x", device_id);
+   assert(len == sizeof(renderer) - 1);
+   _mesa_sha1_update(&ctx, renderer, len);
+   _mesa_sha1_update(&ctx, build_id_data(note), build_id_length(note));
+   _mesa_sha1_final(&ctx, driver_sha1);
+}
+
+void
+brw_get_program_binary_driver_sha1(struct gl_context *ctx, uint8_t *sha1)
+{
+   memcpy(sha1, driver_sha1, sizeof(uint8_t) * 20);
+}
+
+/* This is just a wrapper around brw_program_deserialize_nir() as i965
+ * doesn't need gl_shader_program like other drivers do.
+ */
+void
+brw_deserialize_program_binary(struct gl_context *ctx,
+                               struct gl_shader_program *shProg,
+                               struct gl_program *prog)
+{
+   brw_program_deserialize_nir(ctx, prog, prog->info.stage);
+}

src/mesa/drivers/dri/i965/meson.build

@@ -57,6 +57,7 @@ files_i965 = files(
   'brw_performance_query.c',
   'brw_program.c',
   'brw_program.h',
+  'brw_program_binary.c',
   'brw_program_cache.c',
   'brw_primitive_restart.c',
   'brw_queryobj.c',