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authorEric Anholt <[email protected]>2013-06-26 13:04:51 -0700
committerEric Anholt <[email protected]>2013-10-24 14:12:58 -0700
commit1925a9aebd64b2e08574118891394d9d56db25ae (patch)
tree45bbbf5e0456b9bec210e08c3be349c82fa987c6 /src
parent4e54751624db7cb07cb4d36c3e683d9ed0a30016 (diff)
i965: Build the driver into a shared mesa_dri_drivers.so .
Previously, we've split things such that mesa core is in libdricore, exposing the whole Mesa core interface in the global namespace, and the i965_dri.so code all links against that. Along with polluting application namespace terribly, it requires extra PLT indirections and prevents LTO. Instead, we can build all of the driver contents into the same .so with just a few symbols exposed to be referenced from the actual driver .so file, allowing LTO and reducing our exposed symbol count massively. FPS improvement on GLB2.7 with INTEL_NO_HW=1: 2.61061% +/- 1.16957% (n=50) (without LTO, just the PLT reductions from this commit) Note that the X Server requires commit 7ecfab47eb221dbb996ea6c033348b8eceaeb893 to successfully load this driver! v2: Set a global driverAPI variable so loaders don't have to update to createNewScreen2() (though they may want to for thread safety). v3: Drop AM_CPPFLAGS addition (Emil pointed out I'd missed some cflags that would be necessary, though only if we actually relied on them). v4: Fix install with DESTDIR set. Reviewed-by: Matt Turner <[email protected]> (v1) Reviewed-by: Emil Velikov <[email protected]> (v2)
Diffstat (limited to 'src')
-rw-r--r--src/mesa/drivers/dri/Makefile.am47
-rw-r--r--src/mesa/drivers/dri/common/Makefile.am3
-rw-r--r--src/mesa/drivers/dri/common/dri_util.c19
-rw-r--r--src/mesa/drivers/dri/common/dri_util.h2
-rw-r--r--src/mesa/drivers/dri/common/megadriver_stub.c41
-rw-r--r--src/mesa/drivers/dri/i965/Makefile.am27
-rw-r--r--src/mesa/drivers/dri/i965/intel_screen.c18
-rw-r--r--src/mesa/drivers/dri/i965/intel_screen.h2
8 files changed, 131 insertions, 28 deletions
diff --git a/src/mesa/drivers/dri/Makefile.am b/src/mesa/drivers/dri/Makefile.am
index 7fa0ad73d01..7c573566898 100644
--- a/src/mesa/drivers/dri/Makefile.am
+++ b/src/mesa/drivers/dri/Makefile.am
@@ -1,4 +1,8 @@
+dridir = $(DRI_DRIVER_INSTALL_DIR)
+
SUBDIRS =
+MEGADRIVERS =
+MEGADRIVERS_DEPS =
SUBDIRS+=common
@@ -7,7 +11,9 @@ SUBDIRS+=i915
endif
if HAVE_I965_DRI
-SUBDIRS+=i965
+SUBDIRS += i965
+MEGADRIVERS_DEPS += i965/libi965_dri.la
+MEGADRIVERS += i965_dri.so
endif
if HAVE_NOUVEAU_DRI
@@ -31,3 +37,42 @@ pkgconfig_DATA = dri.pc
driincludedir = $(includedir)/GL/internal
driinclude_HEADERS = $(top_srcdir)/include/GL/internal/dri_interface.h
+
+nodist_EXTRA_mesa_dri_drivers_la_SOURCES = dummy.cpp
+mesa_dri_drivers_la_SOURCES =
+mesa_dri_drivers_la_LDFLAGS = \
+ -module -avoid-version -shared \
+ -Wl,-Bsymbolic \
+ $()
+mesa_dri_drivers_la_LIBADD = \
+ ../../libmesa.la \
+ common/libmegadriver_stub.la \
+ common/libdricommon.la \
+ $(MEGADRIVERS_DEPS) \
+ $(MEGADRIVER_DRI_LIB_DEPS) \
+ $()
+
+if NEED_MEGADRIVER
+dri_LTLIBRARIES = mesa_dri_drivers.la
+
+# Add a link to allow setting LD_LIBRARY_PATH/LIBGL_DRIVERS_PATH to /lib of the build tree.
+all-local: mesa_dri_drivers.la
+ $(MKDIR_P) $(top_builddir)/$(LIB_DIR);
+ $(AM_V_GEN)ln -f .libs/mesa_dri_drivers.so \
+ $(top_builddir)/$(LIB_DIR)/mesa_dri_drivers.so;
+ $(AM_V_GEN)for i in $(MEGADRIVERS); do \
+ ln -f $(top_builddir)/$(LIB_DIR)/mesa_dri_drivers.so \
+ $(top_builddir)/$(LIB_DIR)/$$i; \
+ done;
+
+# hardlink each megadriver instance, but don't actually have
+# mesa_dri_drivers.so in the set of final installed files.
+install-data-hook:
+ for i in $(MEGADRIVERS); do \
+ ln -f $(DESTDIR)$(dridir)/mesa_dri_drivers.so \
+ $(DESTDIR)$(dridir)/$$i; \
+ done;
+ $(RM) -f $(DESTDIR)$(dridir)/mesa_dri_drivers.so
+ $(RM) -f $(DESTDIR)$(dridir)/mesa_dri_drivers.la
+
+endif
diff --git a/src/mesa/drivers/dri/common/Makefile.am b/src/mesa/drivers/dri/common/Makefile.am
index ce4119d0fff..e9c4acaece5 100644
--- a/src/mesa/drivers/dri/common/Makefile.am
+++ b/src/mesa/drivers/dri/common/Makefile.am
@@ -32,6 +32,7 @@ AM_CFLAGS = \
noinst_LTLIBRARIES = \
libdricommon.la \
+ libmegadriver_stub.la \
libdri_test_stubs.la
libdricommon_la_SOURCES = \
@@ -43,4 +44,6 @@ libdri_test_stubs_la_SOURCES = \
dri_test.c
libdri_test_stubs_la_CFLAGS = $(AM_CFLAGS) -DNO_MAIN
+libmegadriver_stub_la_SOURCES = megadriver_stub.c
+
sysconf_DATA = drirc
diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
index 2a85703f2ad..c28b0fc4174 100644
--- a/src/mesa/drivers/dri/common/dri_util.c
+++ b/src/mesa/drivers/dri/common/dri_util.c
@@ -82,6 +82,23 @@ setupLoaderExtensions(__DRIscreen *psp,
}
/**
+ * This pointer determines which driver API we'll use in the case of the
+ * loader not passing us an explicit driver extensions list (that would,
+ * itself, contain a pointer to a driver API.)
+ *
+ * A driver's driDriverGetExtensions_drivername() can update this pointer to
+ * what it's returning, and a loader that is ignorant of createNewScreen2()
+ * will get the correct driver screen created, as long as no other
+ * driDriverGetExtensions() happened in between the first one and the
+ * createNewScreen().
+ *
+ * This allows the X Server to not require the significant dri_interface.h
+ * updates for doing createNewScreen2(), which would discourage backporting of
+ * the X Server patches to support the new loader interface.
+ */
+const struct __DriverAPIRec *globalDriverAPI = &driDriverAPI;
+
+/**
* This is the first entrypoint in the driver called by the DRI driver loader
* after dlopen()ing it.
*
@@ -102,7 +119,7 @@ dri2CreateNewScreen2(int scrn, int fd,
return NULL;
/* By default, use the global driDriverAPI symbol (non-megadrivers). */
- psp->driver = &driDriverAPI;
+ psp->driver = globalDriverAPI;
/* If the driver exposes its vtable through its extensions list
* (megadrivers), use that instead.
diff --git a/src/mesa/drivers/dri/common/dri_util.h b/src/mesa/drivers/dri/common/dri_util.h
index 61c80bc4541..5b56061e299 100644
--- a/src/mesa/drivers/dri/common/dri_util.h
+++ b/src/mesa/drivers/dri/common/dri_util.h
@@ -116,7 +116,7 @@ struct __DriverAPIRec {
};
extern const struct __DriverAPIRec driDriverAPI;
-
+extern const struct __DriverAPIRec *globalDriverAPI;
/**
* Per-screen private driver information.
diff --git a/src/mesa/drivers/dri/common/megadriver_stub.c b/src/mesa/drivers/dri/common/megadriver_stub.c
new file mode 100644
index 00000000000..6bf5d73279a
--- /dev/null
+++ b/src/mesa/drivers/dri/common/megadriver_stub.c
@@ -0,0 +1,41 @@
+/*
+ * 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 <stdio.h>
+#include "dri_util.h"
+
+static const
+__DRIconfig **stub_error_init_screen(__DRIscreen *psp)
+{
+ fprintf(stderr, "An updated DRI driver loader (libGL.so or X Server) is "
+ "required for this Mesa driver.\n");
+ return NULL;
+}
+
+/**
+ * This is a stub driDriverAPI that is referenced by dri_util.c but should
+ * never be used.
+ */
+const struct __DriverAPIRec driDriverAPI = {
+ .InitScreen = stub_error_init_screen,
+};
diff --git a/src/mesa/drivers/dri/i965/Makefile.am b/src/mesa/drivers/dri/i965/Makefile.am
index 71442dd9a64..589a0742b1a 100644
--- a/src/mesa/drivers/dri/i965/Makefile.am
+++ b/src/mesa/drivers/dri/i965/Makefile.am
@@ -38,30 +38,19 @@ AM_CFLAGS = \
AM_CXXFLAGS = $(AM_CFLAGS)
-dridir = $(DRI_DRIVER_INSTALL_DIR)
-
noinst_LTLIBRARIES = libi965_dri.la
-dri_LTLIBRARIES = i965_dri.la
-
libi965_dri_la_SOURCES = $(i965_FILES)
+libi965_dri_la_LIBADD = $(INTEL_LIBS)
-# list of libs to be linked against by i965_dri.so and i965 test programs.
-COMMON_LIBS = \
+TEST_LIBS = \
libi965_dri.la \
../common/libdricommon.la \
- $(DRI_LIB_DEPS) \
- $(INTEL_LIBS)
-
-TEST_LIBS = \
- $(COMMON_LIBS) \
+ ../common/libmegadriver_stub.la \
+ $(MEGADRIVER_DRI_LIB_DEPS) \
+ ../../../libmesa.la \
-lrt \
../common/libdri_test_stubs.la
-i965_dri_la_SOURCES =
-nodist_EXTRA_i965_dri_la_SOURCES = dummy2.cpp
-i965_dri_la_LIBADD = $(COMMON_LIBS)
-i965_dri_la_LDFLAGS = $(DRI_DRIVER_LDFLAGS)
-
TESTS = \
test_eu_compact \
test_vec4_register_coalesce
@@ -77,9 +66,3 @@ test_eu_compact_SOURCES = \
test_eu_compact.c
nodist_EXTRA_test_eu_compact_SOURCES = dummy.cpp
test_eu_compact_LDADD = $(TEST_LIBS)
-
-# Provide compatibility with scripts for the old Mesa build system for
-# a while by putting a link to the driver into /lib of the build tree.
-all-local: i965_dri.la
- $(MKDIR_P) $(top_builddir)/$(LIB_DIR);
- ln -f .libs/i965_dri.so $(top_builddir)/$(LIB_DIR)/i965_dri.so;
diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index 6cec60eae43..eafafa2ccdf 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -1314,7 +1314,7 @@ intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
}
-const struct __DriverAPIRec driDriverAPI = {
+static const struct __DriverAPIRec brw_driver_api = {
.InitScreen = intelInitScreen2,
.DestroyScreen = intelDestroyScreen,
.CreateContext = brwCreateContext,
@@ -1327,10 +1327,22 @@ const struct __DriverAPIRec driDriverAPI = {
.ReleaseBuffer = intelReleaseBuffer
};
-/* This is the table of extensions that the loader will dlsym() for. */
-PUBLIC const __DRIextension *__driDriverExtensions[] = {
+static const struct __DRIDriverVtableExtensionRec brw_vtable = {
+ .base = { __DRI_DRIVER_VTABLE, 1 },
+ .vtable = &brw_driver_api,
+};
+
+static const __DRIextension *brw_driver_extensions[] = {
&driCoreExtension.base,
&driDRI2Extension.base,
+ &brw_vtable.base,
&brw_config_options.base,
NULL
};
+
+PUBLIC const __DRIextension **__driDriverGetExtensions_i965(void)
+{
+ globalDriverAPI = &brw_driver_api;
+
+ return brw_driver_extensions;
+}
diff --git a/src/mesa/drivers/dri/i965/intel_screen.h b/src/mesa/drivers/dri/i965/intel_screen.h
index 0b75c6e6e71..eb9bfca1482 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.h
+++ b/src/mesa/drivers/dri/i965/intel_screen.h
@@ -67,6 +67,8 @@ extern void intelDestroyContext(__DRIcontext * driContextPriv);
extern GLboolean intelUnbindContext(__DRIcontext * driContextPriv);
+PUBLIC const __DRIextension **__driDriverGetExtensions_i965(void);
+
extern GLboolean
intelMakeCurrent(__DRIcontext * driContextPriv,
__DRIdrawable * driDrawPriv,