[PATCH i-g-t 3/4 v4] tests/drv_module_reload: Convert sh script to C version.

[Marius Vlad <marius.c.vlad@intel.com>]

v4:
- adjust test to make use of lib/igt_kmod
- replaced SW_FINISH with SET_CACHEING (Chris Wilson)

v3:
- fix passing boolean value as flags to igt_kmod_unload().

v2:
- embedded gem_alive and gem_exec_store into test (Chris Wilson)
- int main() to igt_main (Chris Wilson)
- moved tests/gem_alive -> tools/gem_info (Chris Wilson)
- added to intel-ci/fast-feedback.testlist (Petri Latvala)
- added hda_dynamic_debug() (Petri Latvala)
- renamed from tests/drv_module_reload_basic to tests/drv_module_reload
(all subtests are basic and have been added to fast-feedback.testlist)

Signed-off-by: Marius Vlad <marius.c.vlad@intel.com>
---
 tests/Makefile.am                     |   1 -
 tests/Makefile.sources                |   2 +-
 tests/drv_module_reload.c             | 415 ++++++++++++++++++++++++++++++++++
 tests/drv_module_reload_basic         | 105 ---------
 tests/gem_alive.c                     |  35 ---
 tests/intel-ci/fast-feedback.testlist |  13 +-
 tools/Makefile.sources                |   1 +
 tools/intel_gem_info.c                |  35 +++
 8 files changed, 464 insertions(+), 143 deletions(-)
 create mode 100644 tests/drv_module_reload.c
 delete mode 100755 tests/drv_module_reload_basic
 delete mode 100644 tests/gem_alive.c
 create mode 100644 tools/intel_gem_info.c

diff --git a/tests/Makefile.am b/tests/Makefile.am
index a408126..14a41ae 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -26,7 +26,6 @@ noinst_PROGRAMS = \
 	$(NULL)
 
 pkglibexec_PROGRAMS = \
-	gem_alive \
 	gem_stress \
 	$(TESTS_progs) \
 	$(TESTS_progs_M) \
diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 6d081c3..b1511c6 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -211,6 +211,7 @@ TESTS_progs = \
 	kms_pwrite_crc \
 	kms_sink_crc_basic \
 	prime_udl \
+	drv_module_reload \
 	$(NULL)
 
 # IMPORTANT: The ZZ_ tests need to be run last!
@@ -221,7 +222,6 @@ TESTS_scripts_M = \
 TESTS_scripts = \
 	debugfs_emon_crash \
 	drv_debugfs_reader \
-	drv_module_reload_basic \
 	kms_sysfs_edid_timing \
 	sysfs_l3_parity \
 	test_rte_check \
diff --git a/tests/drv_module_reload.c b/tests/drv_module_reload.c
new file mode 100644
index 0000000..e52f2f7
--- /dev/null
+++ b/tests/drv_module_reload.c
@@ -0,0 +1,415 @@
+/*
+ * Copyright © 2016 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 "igt.h"
+#include "igt_debugfs.h"
+#include "igt_aux.h"
+#include "igt_kmod.h"
+#include "igt_sysfs.h"
+#include "igt_core.h"
+
+#include <dirent.h>
+#include <sys/utsname.h>
+#include <linux/limits.h>
+#include <signal.h>
+#include <libgen.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+
+
+#define LOCAL_I915_EXEC_BSD_SHIFT      (13)
+#define LOCAL_I915_EXEC_BSD_MASK       (3 << LOCAL_I915_EXEC_BSD_SHIFT)
+
+#define ENGINE_MASK  (I915_EXEC_RING_MASK | LOCAL_I915_EXEC_BSD_MASK)
+
+static void store_dword(int fd, unsigned ring)
+{
+	const int gen = intel_gen(intel_get_drm_devid(fd));
+	struct drm_i915_gem_exec_object2 obj[2];
+	struct drm_i915_gem_relocation_entry reloc;
+	struct drm_i915_gem_execbuffer2 execbuf;
+	uint32_t batch[16];
+	int i;
+
+	gem_require_ring(fd, ring);
+	igt_skip_on_f(gen == 6 && (ring & ~(3<<13)) == I915_EXEC_BSD,
+		      "MI_STORE_DATA broken on gen6 bsd\n");
+
+	intel_detect_and_clear_missed_interrupts(fd);
+	memset(&execbuf, 0, sizeof(execbuf));
+	execbuf.buffers_ptr = (uintptr_t)obj;
+	execbuf.buffer_count = 2;
+	execbuf.flags = ring;
+	if (gen < 6)
+		execbuf.flags |= I915_EXEC_SECURE;
+
+	memset(obj, 0, sizeof(obj));
+	obj[0].handle = gem_create(fd, 4096);
+	obj[1].handle = gem_create(fd, 4096);
+
+	memset(&reloc, 0, sizeof(reloc));
+	reloc.target_handle = obj[0].handle;
+	reloc.presumed_offset = 0;
+	reloc.offset = sizeof(uint32_t);
+	reloc.delta = 0;
+	reloc.read_domains = I915_GEM_DOMAIN_INSTRUCTION;
+	reloc.write_domain = I915_GEM_DOMAIN_INSTRUCTION;
+	obj[1].relocs_ptr = (uintptr_t)&reloc;
+	obj[1].relocation_count = 1;
+
+	i = 0;
+	batch[i] = MI_STORE_DWORD_IMM | (gen < 6 ? 1 << 22 : 0);
+	if (gen >= 8) {
+		batch[++i] = 0;
+		batch[++i] = 0;
+	} else if (gen >= 4) {
+		batch[++i] = 0;
+		batch[++i] = 0;
+		reloc.offset += sizeof(uint32_t);
+	} else {
+		batch[i]--;
+		batch[++i] = 0;
+	}
+	batch[++i] = 0xc0ffee;
+	batch[++i] = MI_BATCH_BUFFER_END;
+	gem_write(fd, obj[1].handle, 0, batch, sizeof(batch));
+	gem_execbuf(fd, &execbuf);
+	gem_close(fd, obj[1].handle);
+
+	gem_read(fd, obj[0].handle, 0, batch, sizeof(batch));
+	gem_close(fd, obj[0].handle);
+	igt_assert_eq(*batch, 0xc0ffee);
+	igt_assert_eq(intel_detect_and_clear_missed_interrupts(fd), 0);
+}
+
+static void store_all(int fd)
+{
+	const int gen = intel_gen(intel_get_drm_devid(fd));
+	struct drm_i915_gem_exec_object2 obj[2];
+	struct drm_i915_gem_relocation_entry reloc[32];
+	struct drm_i915_gem_execbuffer2 execbuf;
+	unsigned engines[16], permuted[16];
+	uint32_t batch[16];
+	uint64_t offset;
+	unsigned engine, nengine;
+	int value;
+	int i, j;
+
+	memset(&execbuf, 0, sizeof(execbuf));
+	execbuf.buffers_ptr = (uintptr_t)obj;
+	execbuf.buffer_count = 2;
+	if (gen < 6)
+		execbuf.flags |= I915_EXEC_SECURE;
+
+	memset(reloc, 0, sizeof(reloc));
+	memset(obj, 0, sizeof(obj));
+	obj[0].handle = gem_create(fd, 4096);
+	obj[1].handle = gem_create(fd, 4096);
+	obj[1].relocation_count = 1;
+
+	offset = sizeof(uint32_t);
+	i = 0;
+	batch[i] = MI_STORE_DWORD_IMM | (gen < 6 ? 1 << 22 : 0);
+	if (gen >= 8) {
+		batch[++i] = 0;
+		batch[++i] = 0;
+	} else if (gen >= 4) {
+		batch[++i] = 0;
+		batch[++i] = 0;
+		offset += sizeof(uint32_t);
+	} else {
+		batch[i]--;
+		batch[++i] = 0;
+	}
+	batch[value = ++i] = 0xc0ffee;
+	batch[++i] = MI_BATCH_BUFFER_END;
+
+	nengine = 0;
+	intel_detect_and_clear_missed_interrupts(fd);
+	for_each_engine(fd, engine) {
+		if (gen == 6 && (engine & ~(3<<13)) == I915_EXEC_BSD)
+			continue;
+
+		igt_assert(2*(nengine+1)*sizeof(batch) <= 4096);
+
+		execbuf.flags &= ~ENGINE_MASK;
+		execbuf.flags |= engine;
+
+		j = 2*nengine;
+		reloc[j].target_handle = obj[0].handle;
+		reloc[j].presumed_offset = ~0;
+		reloc[j].offset = j*sizeof(batch) + offset;
+		reloc[j].delta = nengine*sizeof(uint32_t);
+		reloc[j].read_domains = I915_GEM_DOMAIN_INSTRUCTION;
+		reloc[j].write_domain = I915_GEM_DOMAIN_INSTRUCTION;
+		obj[1].relocs_ptr = (uintptr_t)&reloc[j];
+
+		batch[value] = 0xdeadbeef;
+		gem_write(fd, obj[1].handle, j*sizeof(batch),
+			  batch, sizeof(batch));
+		execbuf.batch_start_offset = j*sizeof(batch);
+		gem_execbuf(fd, &execbuf);
+
+		j = 2*nengine + 1;
+		reloc[j].target_handle = obj[0].handle;
+		reloc[j].presumed_offset = ~0;
+		reloc[j].offset = j*sizeof(batch) + offset;
+		reloc[j].delta = nengine*sizeof(uint32_t);
+		reloc[j].read_domains = I915_GEM_DOMAIN_INSTRUCTION;
+		reloc[j].write_domain = I915_GEM_DOMAIN_INSTRUCTION;
+		obj[1].relocs_ptr = (uintptr_t)&reloc[j];
+
+		batch[value] = nengine;
+		gem_write(fd, obj[1].handle, j*sizeof(batch),
+			  batch, sizeof(batch));
+		execbuf.batch_start_offset = j*sizeof(batch);
+		gem_execbuf(fd, &execbuf);
+
+		engines[nengine++] = engine;
+	}
+	gem_sync(fd, obj[1].handle);
+
+	for (i = 0; i < nengine; i++) {
+		obj[1].relocs_ptr = (uintptr_t)&reloc[2*i];
+		execbuf.batch_start_offset = 2*i*sizeof(batch);
+		memcpy(permuted, engines, nengine*sizeof(engines[0]));
+		igt_permute_array(permuted, nengine, igt_exchange_int);
+		for (j = 0; j < nengine; j++) {
+			execbuf.flags &= ~ENGINE_MASK;
+			execbuf.flags |= permuted[j];
+			gem_execbuf(fd, &execbuf);
+		}
+		obj[1].relocs_ptr = (uintptr_t)&reloc[2*i+1];
+		execbuf.batch_start_offset = (2*i+1)*sizeof(batch);
+		execbuf.flags &= ~ENGINE_MASK;
+		execbuf.flags |= engines[i];
+		gem_execbuf(fd, &execbuf);
+	}
+	gem_close(fd, obj[1].handle);
+
+	gem_read(fd, obj[0].handle, 0, engines, sizeof(engines));
+	gem_close(fd, obj[0].handle);
+
+	for (i = 0; i < nengine; i++)
+		igt_assert_eq_u32(engines[i], i);
+	igt_assert_eq(intel_detect_and_clear_missed_interrupts(fd), 0);
+}
+
+static int
+unload(void)
+{
+	kick_fbcon(false);
+
+	if (igt_kmod_is_loaded("snd_hda_intel")) {
+		igt_assert(!igt_pkill(SIGTERM, "alsactl"));
+
+		if (igt_kmod_unload("snd_hda_intel", 0)) {
+			igt_info("Could not unload snd_hda_intel\n");
+			return IGT_EXIT_FAILURE;
+		}
+	}
+
+	/* gen5 */
+	if (igt_kmod_is_loaded("intel_ips")) {
+		igt_kmod_unload("intel_ips", 0);
+	}
+
+	if (igt_kmod_is_loaded("i915")) {
+		if (igt_kmod_unload("i915", 0)) {
+			igt_info("Could not unload i915\n");
+			return IGT_EXIT_SKIP;
+		} else {
+			igt_info("i915.ko has been unloaded!\n");
+		}
+	}
+
+	if (igt_kmod_is_loaded("intel-gtt")) {
+		igt_kmod_unload("intel-gtt", 0);
+	}
+
+	igt_assert(!igt_kmod_unload("drm_kms_helper", 0));
+	igt_assert(!igt_kmod_unload("drm", 0));
+
+	if (igt_kmod_is_loaded("i915")) {
+		igt_info("WARNING: i915.ko still loaded!\n");
+		return IGT_EXIT_FAILURE;
+	} else {
+		igt_info("module successfully unloaded\n");
+	}
+
+	return IGT_EXIT_SUCCESS;
+}
+
+static int
+load(const char *opts_i915)
+{
+	if (opts_i915)
+		igt_info("Reloading i915 with %s\n\n", opts_i915);
+
+	/* we do not have automatic loading of dependencies */
+	igt_assert(!igt_kmod_load("drm", NULL));
+	igt_assert(!igt_kmod_load("drm_kms_helper", NULL));
+
+	if (igt_kmod_load("i915", opts_i915)) {
+		igt_info("Could not load i915\n");
+		return IGT_EXIT_FAILURE;
+	}
+
+	kick_fbcon(true);
+	igt_assert(!igt_kmod_load("snd_hda_intel", NULL));
+
+	return IGT_EXIT_SUCCESS;
+}
+
+static int
+reload(const char *opts_i915)
+{
+	int err = IGT_EXIT_SUCCESS;
+
+	if ((err = unload()))
+		return err;
+
+	if ((err = load(opts_i915)))
+		return err;
+
+	return err;
+}
+
+static int
+gem_info(int fd)
+{
+	struct drm_i915_gem_sw_finish arg = { 0 };
+
+	signal(SIGALRM, SIG_IGN);
+
+	alarm(1);
+	if (ioctl(fd, DRM_IOCTL_I915_GEM_SW_FINISH, &arg) == 0) {
+		return IGT_EXIT_SKIP;
+	}
+
+	switch (errno) {
+	case ENOENT:
+		return 0;
+	case EIO:
+		return 1;
+	case EINTR:
+		return 2;
+	default:
+		return 3;
+	}
+}
+
+static int
+gem_exec_store(int fd)
+{
+	const struct intel_execution_engine *e;
+	igt_fixture {
+		igt_fork_hang_detector(fd);
+	}
+
+	for (e = intel_execution_engines; e->name; e++) {
+		igt_subtest_f("basic-exec-store-%s", e->name)
+			store_dword(fd, e->exec_id | e->flags);
+	}
+
+	igt_subtest("basic-exec-store-all")
+		store_all(fd);
+
+	igt_fixture
+		igt_stop_hang_detector();
+
+	return IGT_EXIT_SUCCESS;
+}
+
+static void
+hda_dynamic_debug(bool enable)
+{
+	FILE *fp;
+	const char snd_hda_intel_on[] = "module snd_hda_intel +pf";
+	const char snd_hda_core_on[] = "module snd_hda_core +pf";
+
+	const char snd_hda_intel_off[] = "module snd_hda_core =_";
+	const char snd_hda_core_off[] = "module snd_hda_intel =_";
+
+	fp = fopen("/sys/kernel/debug/dynamic_debug/control", "w");
+	igt_assert(fp != NULL);
+
+	if (enable) {
+		fwrite(snd_hda_intel_on, 1, sizeof(snd_hda_intel_on), fp);
+		fwrite(snd_hda_core_on, 1, sizeof(snd_hda_core_on), fp);
+	} else {
+		fwrite(snd_hda_intel_off, 1, sizeof(snd_hda_intel_off), fp);
+		fwrite(snd_hda_core_off, 1, sizeof(snd_hda_core_off), fp);
+	}
+
+	fclose(fp);
+}
+
+
+igt_main
+{
+	int i, err;
+	char buf[64];
+
+	igt_fixture
+		hda_dynamic_debug(true);
+
+	igt_subtest("basic-reload") {
+		if ((err = reload(NULL)))
+			igt_fail(err);
+	}
+
+	igt_subtest_group {
+		int fd;
+
+		igt_fixture
+			fd = __drm_open_driver(DRIVER_INTEL);
+
+		igt_subtest_group {
+			igt_subtest("basic-gem-info")
+				if ((err = gem_info(fd)))
+					igt_fail(err);
+			igt_subtest_group
+				if ((err = gem_exec_store(fd)))
+					igt_fail(err);
+		}
+
+		igt_fixture
+			close(fd);
+	}
+
+	igt_subtest("basic-reload-inject") {
+		for (i = 0; i < 4; i++) {
+			memset(buf, 0, sizeof(buf));
+			snprintf(buf, sizeof(buf), "inject_load_failure=%d", i);
+			reload(buf);
+		}
+	}
+
+	igt_subtest("basic-reload-final")
+		if ((err = reload(NULL)))
+			igt_fail(err);
+
+	igt_fixture
+		hda_dynamic_debug(false);
+}
diff --git a/tests/drv_module_reload_basic b/tests/drv_module_reload_basic
deleted file mode 100755
index b8cad88..0000000
--- a/tests/drv_module_reload_basic
+++ /dev/null
@@ -1,105 +0,0 @@
-#!/bin/bash
-#
-# Testcase: Reload the drm module
-#
-# ... we've broken this way too often :(
-#
-
-SOURCE_DIR="$( dirname "${BASH_SOURCE[0]}" )"
-. $SOURCE_DIR/drm_lib.sh
-
-# no other drm service should be running, so we can just unbind
-
-# return 0 if module by name $1 is loaded according to lsmod
-function mod_loaded()
-{
-	lsmod | grep -w "^$1" &> /dev/null
-}
-
-function reload() {
-	local snd_hda_intel_unloaded
-
-	echo Reloading i915.ko with $*
-
-	# we must kick away fbcon (but only fbcon)
-	for vtcon in /sys/class/vtconsole/vtcon*/ ; do
-		if grep "frame buffer device" $vtcon/name > /dev/null ; then
-			echo unbinding $vtcon: `cat $vtcon/name`
-			echo 0 > $vtcon/bind
-		fi
-	done
-
-	# The sound driver uses our power well
-	pkill alsactl
-	snd_hda_intel_unloaded=0
-	if mod_loaded snd_hda_intel; then
-		if rmmod snd_hda_intel; then
-			snd_hda_intel_unloaded=1
-		else
-			lsmod >&2
-		fi
-	fi
-
-	# gen5 only
-	if mod_loaded intel_ips; then
-		rmmod intel_ips
-	fi
-
-	if ! rmmod i915; then
-		lsmod >&2
-		return $IGT_EXIT_SKIP
-	fi
-	#ignore errors in intel-gtt, often built-in
-	rmmod intel-gtt &> /dev/null
-	# drm may be used by other devices (nouveau, radeon, udl, etc)
-	rmmod drm_kms_helper &> /dev/null
-	rmmod drm &> /dev/null
-
-	if mod_loaded i915; then
-		echo WARNING: i915.ko still loaded!
-		return $IGT_EXIT_FAILURE
-	else
-		echo module successfully unloaded
-	fi
-
-	modprobe i915 $*
-
-	if [ -f /sys/class/vtconsole/vtcon1/bind ]; then
-		echo 1 > /sys/class/vtconsole/vtcon1/bind
-	fi
-
-	modprobe -q snd_hda_intel || return $snd_hda_intel_unloaded
-}
-
-function finish_load() {
-	# does the device exist?
-	if $SOURCE_DIR/gem_alive > /dev/null ; then
-		echo "module successfully loaded again"
-	else
-		echo "failed to reload module successfully"
-		return $IGT_EXIT_FAILURE
-	fi
-
-	# then try to run something
-	if ! $SOURCE_DIR/gem_exec_store > /dev/null ; then
-		echo "failed to execute a simple batch after reload"
-		return $IGT_EXIT_FAILURE
-	fi
-
-	return $IGT_EXIT_SUCCESS
-}
-
-hda_dynamic_debug_enable
-
-reload || exit $?
-finish_load || exit $?
-
-# Repeat the module reload trying to to generate faults
-for i in $(seq 1 4); do
-	reload inject_load_failure=$i
-done
-
-reload || exit $?
-finish_load
-
-exit $?
diff --git a/tests/gem_alive.c b/tests/gem_alive.c
deleted file mode 100644
index 7544443..0000000
--- a/tests/gem_alive.c
+++ /dev/null
@@ -1,35 +0,0 @@
-#include "igt.h"
-#include <sys/ioctl.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <string.h>
-#include <signal.h>
-#include <i915_drm.h>
-
-
-int main(void)
-{
-	struct drm_i915_gem_sw_finish arg = { 0 };
-	int fd;
-
-	signal(SIGALRM, SIG_IGN);
-
-	fd = __drm_open_driver(DRIVER_INTEL);
-	if (fd < 0)
-		return IGT_EXIT_SKIP;
-
-	alarm(1);
-	if (ioctl(fd, DRM_IOCTL_I915_GEM_SW_FINISH, &arg) == 0)
-		return IGT_EXIT_SKIP;
-
-	switch (errno) {
-	case ENOENT:
-		return 0;
-	case EIO:
-		return 1;
-	case EINTR:
-		return 2;
-	default:
-		return 3;
-	}
-}
diff --git a/tests/intel-ci/fast-feedback.testlist b/tests/intel-ci/fast-feedback.testlist
index f59ec98..3c516ed 100644
--- a/tests/intel-ci/fast-feedback.testlist
+++ b/tests/intel-ci/fast-feedback.testlist
@@ -3,7 +3,18 @@ igt@core_prop_blob@basic
 igt@drv_getparams_basic@basic-eu-total
 igt@drv_getparams_basic@basic-subslice-total
 igt@drv_hangman@error-state-basic
-igt@drv_module_reload_basic
+igt@drv_module_reload@basic-reload
+igt@drv_module_reload@basic-gem-info
+igt@drv_module_reload@basic-exec-store-default
+igt@drv_module_reload@basic-exec-store-render
+igt@drv_module_reload@basic-exec-store-bsd
+igt@drv_module_reload@basic-exec-store-bsd1
+igt@drv_module_reload@basic-exec-store-bsd2
+igt@drv_module_reload@basic-exec-store-blt
+igt@drv_module_reload@basic-exec-store-vebox
+igt@drv_module_reload@basic-exec-store-all
+igt@drv_module_reload@basic-reload-inject
+igt@drv_module_reload@basic-reload-final
 igt@gem_basic@bad-close
 igt@gem_basic@create-close
 igt@gem_basic@create-fd-close
diff --git a/tools/Makefile.sources b/tools/Makefile.sources
index be58871..e2451ea 100644
--- a/tools/Makefile.sources
+++ b/tools/Makefile.sources
@@ -29,6 +29,7 @@ tools_prog_lists =		\
 	intel_residency		\
 	intel_stepping		\
 	intel_watermark		\
+	intel_gem_info		\
 	$(NULL)
 
 dist_bin_SCRIPTS = intel_gpu_abrt
diff --git a/tools/intel_gem_info.c b/tools/intel_gem_info.c
new file mode 100644
index 0000000..7544443
--- /dev/null
+++ b/tools/intel_gem_info.c
@@ -0,0 +1,35 @@
+#include "igt.h"
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <signal.h>
+#include <i915_drm.h>
+
+
+int main(void)
+{
+	struct drm_i915_gem_sw_finish arg = { 0 };
+	int fd;
+
+	signal(SIGALRM, SIG_IGN);
+
+	fd = __drm_open_driver(DRIVER_INTEL);
+	if (fd < 0)
+		return IGT_EXIT_SKIP;
+
+	alarm(1);
+	if (ioctl(fd, DRM_IOCTL_I915_GEM_SW_FINISH, &arg) == 0)
+		return IGT_EXIT_SKIP;
+
+	switch (errno) {
+	case ENOENT:
+		return 0;
+	case EIO:
+		return 1;
+	case EINTR:
+		return 2;
+	default:
+		return 3;
+	}
+}
-- 
2.7.4

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