broadcom: Introduce a v3d_debug.h header for vc5 and broadcom Vulkan.

Unlike vc4, where the compiler and gallium driver live together, for vc5
the compiler will live up in the shared broadcom directory, and need
access to the debug flags.  Define a set of debug flags and helpers there,
so it can be shared between compiler, vc5, and vulkan.

1 files changed, 89 insertions, 0 deletions

diff --git a/src/broadcom/common/v3d_debug.c b/src/broadcom/common/v3d_debug.c
new file mode 100644
index 00000000000..630bfe0fc25
--- /dev/null
+++ b/src/broadcom/common/v3d_debug.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2003 VMware, Inc.
+ * Copyright © 2006 Intel Corporation
+ * Copyright © 2017 Broadcom
+ *
+ * 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.
+ */
+
+/**
+ * \file v3d_debug.c
+ *
+ * Support for the V3D_DEBUG environment variable, along with other
+ * miscellaneous debugging code.
+ */
+
+#include <stdlib.h>
+
+#include "common/v3d_debug.h"
+#include "util/macros.h"
+#include "util/debug.h"
+#include "c11/threads.h"
+
+uint32_t V3D_DEBUG = 0;
+
+static const struct debug_control debug_control[] = {
+        { "cl",          V3D_DEBUG_CL},
+        { "qpu",         V3D_DEBUG_QPU},
+        { "vir",         V3D_DEBUG_VIR},
+        { "nir",         V3D_DEBUG_NIR},
+        { "tgsi",        V3D_DEBUG_TGSI},
+        { "shaderdb",    V3D_DEBUG_SHADERDB},
+        { "surface",     V3D_DEBUG_SURFACE},
+        { "perf",        V3D_DEBUG_PERF},
+        { "norast",      V3D_DEBUG_NORAST},
+        { "fs",          V3D_DEBUG_FS},
+        { "vs",          V3D_DEBUG_VS},
+        { "cs",          V3D_DEBUG_CS},
+        { NULL,    0 }
+};
+
+uint32_t
+v3d_debug_flag_for_shader_stage(gl_shader_stage stage)
+{
+        uint32_t flags[] = {
+                [MESA_SHADER_VERTEX] = V3D_DEBUG_VS,
+                [MESA_SHADER_TESS_CTRL] = 0,
+                [MESA_SHADER_TESS_EVAL] = 0,
+                [MESA_SHADER_GEOMETRY] = 0,
+                [MESA_SHADER_FRAGMENT] = V3D_DEBUG_FS,
+                [MESA_SHADER_COMPUTE] = V3D_DEBUG_CS,
+        };
+        STATIC_ASSERT(MESA_SHADER_STAGES == 6);
+        return flags[stage];
+}
+
+static void
+v3d_process_debug_variable_once(void)
+{
+        V3D_DEBUG = parse_debug_string(getenv("V3D_DEBUG"), debug_control);
+
+        if (V3D_DEBUG & V3D_DEBUG_SHADERDB)
+                V3D_DEBUG |= V3D_DEBUG_NORAST;
+}
+
+void
+v3d_process_debug_variable(void)
+{
+        static once_flag v3d_process_debug_variable_flag = ONCE_FLAG_INIT;
+
+        call_once(&v3d_process_debug_variable_flag,
+                  v3d_process_debug_variable_once);
+}