vc4: Initial skeleton driver import.

This mostly just takes every draw call and turns it into a sequence of
commands that clear the FBO and draw a single shaded triangle to it,
regardless of the actual input vertices or shaders.  I copied the initial
driver skeleton mostly from freedreno, and I've preserved Rob Clark's
copyright for those.  I also based my initial hardcoded shaders and
command lists on Scott Mansell (phire)'s "hackdriver" project, though the
bit patterns of the shaders emitted end up being different.

v2: Rebase on gallium megadrivers changes.
v3: Rebase on PIPE_SHADER_CAP_MAX_CONSTS change.
v4: Rely on simpenrose actually being installed when building for
    simulation.
v5: Add more header duplicate-include guards.
v6: Apply Emil's review (protection against vc4 sim and ilo at the same
    time, and dropping the dricommon drm bits) and fix a copyright header
    (thanks, Roland)

5 files changed, 102 insertions, 0 deletions

diff --git a/src/gallium/winsys/Makefile.am b/src/gallium/winsys/Makefile.am
index 4c01afdee20..76d95b9d35c 100644
--- a/src/gallium/winsys/Makefile.am
+++ b/src/gallium/winsys/Makefile.am
@@ -70,4 +70,8 @@ endif
 if HAVE_GALLIUM_SVGA
 SUBDIRS += svga/drm
 endif
+
+if HAVE_GALLIUM_VC4
+SUBDIRS += vc4/drm
+endif
 endif
diff --git a/src/gallium/winsys/vc4/drm/Makefile.am b/src/gallium/winsys/vc4/drm/Makefile.am
new file mode 100644
index 00000000000..3bbeb30f1df
--- /dev/null
+++ b/src/gallium/winsys/vc4/drm/Makefile.am
@@ -0,0 +1,31 @@
+# Copyright © 2014 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.
+
+include Makefile.sources
+include $(top_srcdir)/src/gallium/Automake.inc
+
+AM_CFLAGS = \
+	-I$(top_srcdir)/src/gallium/drivers \
+	$(GALLIUM_WINSYS_CFLAGS)
+
+noinst_LTLIBRARIES = libvc4drm.la
+
+libvc4drm_la_SOURCES = $(C_SOURCES)
diff --git a/src/gallium/winsys/vc4/drm/Makefile.sources b/src/gallium/winsys/vc4/drm/Makefile.sources
new file mode 100644
index 00000000000..97cf2eac47c
--- /dev/null
+++ b/src/gallium/winsys/vc4/drm/Makefile.sources
@@ -0,0 +1,2 @@
+C_SOURCES := \
+	vc4_drm_winsys.c
diff --git a/src/gallium/winsys/vc4/drm/vc4_drm_public.h b/src/gallium/winsys/vc4/drm/vc4_drm_public.h
new file mode 100644
index 00000000000..f9d0585a3e0
--- /dev/null
+++ b/src/gallium/winsys/vc4/drm/vc4_drm_public.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2014 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.
+ */
+
+#ifndef __VC4_DRM_PUBLIC_H__
+#define __VC4_DRM_PUBLIC_H__
+
+struct pipe_screen;
+
+struct pipe_screen *vc4_drm_screen_create(int drmFD);
+
+#endif /* __VC4_DRM_PUBLIC_H__ */
diff --git a/src/gallium/winsys/vc4/drm/vc4_drm_winsys.c b/src/gallium/winsys/vc4/drm/vc4_drm_winsys.c
new file mode 100644
index 00000000000..c5434adbb43
--- /dev/null
+++ b/src/gallium/winsys/vc4/drm/vc4_drm_winsys.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2014 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.
+ */
+
+#include <unistd.h>
+
+#include "vc4_drm_public.h"
+
+#include "vc4/vc4_screen.h"
+
+struct pipe_screen *
+vc4_drm_screen_create(int fd)
+{
+	return vc4_screen_create(dup(fd));
+}