[PATCH i-g-t v9 1/1] tests: Add a new test for device hot unplug
Janusz Krzysztofik
janusz.krzysztofik at linux.intel.com
Wed May 8 16:35:12 UTC 2019
From: Janusz Krzysztofik <janusz.krzysztofik at intel.com>
Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik at intel.com>
---
tests/Makefile.sources | 1 +
tests/core_hotunplug.c | 456 +++++++++++++++++++++++++++++++++++++++++
tests/meson.build | 1 +
3 files changed, 458 insertions(+)
create mode 100644 tests/core_hotunplug.c
diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 7f921f6c..08942f00 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -16,6 +16,7 @@ TESTS_progs = \
core_getclient \
core_getstats \
core_getversion \
+ core_hotunplug \
core_setmaster_vs_auth \
debugfs_test \
drm_import_export \
diff --git a/tests/core_hotunplug.c b/tests/core_hotunplug.c
new file mode 100644
index 00000000..6c4600ad
--- /dev/null
+++ b/tests/core_hotunplug.c
@@ -0,0 +1,456 @@
+/*
+ * Copyright © 2019 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_device.h"
+#include "igt_dummyload.h"
+#include "igt_kmod.h"
+#include "igt_sysfs.h"
+
+#include <limits.h>
+#include <string.h>
+#include <unistd.h>
+
+/* Re-bind the driver to the device */
+static void driver_bind(int drv, const char *addr)
+{
+ igt_set_timeout(60, "Driver re-bind timeout!");
+ igt_sysfs_set(drv, "bind", addr);
+ igt_reset_timeout();
+
+ close(drv);
+}
+
+/* Unbind the driver from the device */
+static void driver_unbind(int drv, const char *addr)
+{
+ igt_set_timeout(60, "Driver unbind timeout!");
+ igt_sysfs_set(drv, "unbind", addr);
+ igt_reset_timeout();
+
+ /* don't close drv, it will be used for driver rebinding */
+}
+
+/* Re-discover the device by rescanning its bus */
+static void bus_rescan(int bus)
+{
+ igt_set_timeout(60, "Bus rescan timeout!");
+ igt_sysfs_set(bus, "rescan", "1");
+ igt_reset_timeout();
+
+ close(bus);
+}
+
+/* Remove (virtually unplug) the device from its bus */
+static void device_unplug(int dev)
+{
+ igt_set_timeout(60, "Device unplug timeout!");
+ igt_sysfs_set(dev, "device/remove", "1");
+ igt_reset_timeout();
+
+ close(dev);
+}
+
+static bool module_unload(int chipset, const char *module)
+{
+ if (chipset == DRIVER_INTEL)
+ return igt_i915_driver_unload() == IGT_EXIT_SUCCESS;
+ else
+ return igt_kmod_unload(module, 0) == 0;
+}
+
+static void unbind_rebind(int chipset)
+{
+ int fd, dev, drv, len;
+ char path[PATH_MAX];
+ const char *addr;
+
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ dev = igt_sysfs_open(fd);
+ igt_assert(dev >= 0);
+
+ close(fd);
+
+ /* collect information required for driver bind/unbind */
+ drv = openat(dev, "device/driver", O_DIRECTORY);
+ igt_assert(drv >= 0);
+
+ len = readlinkat(dev, "device", path, sizeof(path) - 1);
+ path[len] = '\0';
+ addr = strrchr(path, '/') + 1;
+
+ close(dev);
+
+ igt_debug("unbinding driver\n");
+ driver_unbind(drv, addr);
+
+ igt_debug("rebinding driver\n");
+ driver_bind(drv, addr);
+
+ igt_debug("reopening device\n");
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ close(fd);
+}
+
+static void unplug_rescan(int chipset)
+{
+ int fd, dev, bus;
+
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ dev = igt_sysfs_open(fd);
+ igt_assert(dev >= 0);
+
+ close(fd);
+
+ /* collect information required for bus rescan */
+ bus = openat(dev, "device/subsystem", O_DIRECTORY);
+ igt_assert(bus >= 0);
+
+ igt_debug("unplugging device\n");
+ device_unplug(dev);
+
+ igt_debug("recovering device\n");
+ bus_rescan(bus);
+
+ igt_debug("reopening driver\n");
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ close(fd);
+}
+
+static void drm_open_hotunplug(int chipset)
+{
+ int fd, dev, bus;
+
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ dev = igt_sysfs_open(fd);
+ igt_assert(dev >= 0);
+
+ /* collect information required for bus rescan */
+ bus = openat(dev, "device/subsystem", O_DIRECTORY);
+ igt_assert(bus >= 0);
+
+ igt_debug("unplugging device\n");
+ device_unplug(dev);
+
+ igt_debug("recovering device\n");
+ bus_rescan(bus);
+
+ igt_debug("closing device\n");
+ close(fd);
+
+ igt_debug("reopening driver\n");
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ close(fd);
+}
+
+static void gem_buffer_hotunplug(int chipset)
+{
+ int fd, dev, bus;
+ struct igt_fb fb;
+
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ igt_debug("creating GEM object\n");
+ igt_create_bo_for_fb(fd, 1, 1, DRM_FORMAT_XRGB8888, 0, &fb);
+
+ dev = igt_sysfs_open(fd);
+ igt_assert(dev >= 0);
+
+ /* collect information required for bus rescan */
+ bus = openat(dev, "device/subsystem", O_DIRECTORY);
+ igt_assert(bus >= 0);
+
+ igt_debug("unplugging device\n");
+ device_unplug(dev);
+
+ igt_debug("recovering device\n");
+ bus_rescan(bus);
+
+ igt_debug("closing device\n");
+ close(fd);
+
+ igt_debug("reopening driver\n");
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ close(fd);
+}
+
+static void gem_mmap_hotunplug(int chipset)
+{
+ int fd, dev, bus;
+ struct igt_fb fb;
+
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ igt_debug("mmapping GEM object\n");
+ igt_create_bo_for_fb(fd, 1, 1, DRM_FORMAT_XRGB8888, 0, &fb);
+ igt_ignore_warn(igt_fb_map_buffer(fd, &fb));
+
+ dev = igt_sysfs_open(fd);
+ igt_assert(dev >= 0);
+
+ /* collect information required for bus rescan */
+ bus = openat(dev, "device/subsystem", O_DIRECTORY);
+ igt_assert(bus >= 0);
+
+ igt_debug("unplugging device\n");
+ device_unplug(dev);
+
+ igt_debug("recovering device\n");
+ bus_rescan(bus);
+
+ igt_debug("closing device\n");
+ close(fd);
+
+ igt_debug("reopening driver\n");
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ close(fd);
+}
+
+static void i915_context_hotunplug(int chipset)
+{
+ int fd, dev, bus;
+
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ gem_require_contexts(fd);
+
+ igt_debug("creating GEM context\n");
+ igt_ignore_warn(gem_context_create(fd));
+
+ dev = igt_sysfs_open(fd);
+ igt_assert(dev >= 0);
+
+ /* collect information required for bus rescan */
+ bus = openat(dev, "device/subsystem", O_DIRECTORY);
+ igt_assert(bus >= 0);
+
+ igt_debug("unplugging device\n");
+ device_unplug(dev);
+
+ igt_debug("recovering device\n");
+ bus_rescan(bus);
+
+ igt_debug("closing device\n");
+ close(fd);
+
+ igt_debug("reopening driver\n");
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ close(fd);
+}
+
+static void i915_hotunplug_write(int chipset)
+{
+ int fd, dev, bus, gem;
+ const uint32_t bbe = MI_BATCH_BUFFER_END;
+
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ igt_require_gem(fd);
+
+ igt_debug("creating GEM buffer object\n");
+ gem = gem_create(fd, 1);
+
+ dev = igt_sysfs_open(fd);
+ igt_assert(dev >= 0);
+
+ /* collect information required for bus rescan */
+ bus = openat(dev, "device/subsystem", O_DIRECTORY);
+ igt_assert(bus >= 0);
+
+ igt_debug("unplugging device\n");
+ device_unplug(dev);
+
+ igt_debug("trying to write to GEM buffer\n");
+ igt_assert_neq(__gem_write(fd, gem, 0, &bbe, sizeof(bbe)), 0);
+
+ igt_debug("recovering device\n");
+ bus_rescan(bus);
+
+ igt_debug("closing device\n");
+ close(fd);
+
+ igt_debug("reopening driver\n");
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ close(fd);
+}
+
+static void i915_spin_hotunplug(int chipset)
+{
+ int fd, dev, bus;
+
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ igt_debug("submitting dummy load\n");
+ igt_ignore_warn(igt_spin_new(fd));
+
+ dev = igt_sysfs_open(fd);
+ igt_assert(dev >= 0);
+
+ /* collect information required for bus rescan */
+ bus = openat(dev, "device/subsystem", O_DIRECTORY);
+ igt_assert(bus >= 0);
+
+ igt_debug("unplugging device\n");
+ device_unplug(dev);
+
+ igt_debug("recovering device\n");
+ bus_rescan(bus);
+
+ igt_debug("closing device\n");
+ close(fd);
+
+ igt_debug("reopening driver\n");
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ igt_debug("performing healthcheck\n");
+ gem_test_engine(fd, ALL_ENGINES);
+
+ close(fd);
+}
+
+static void drm_hotunplug_unload(int chipset, const char *module)
+{
+ int fd, dev, bus;
+
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ dev = igt_sysfs_open(fd);
+ igt_assert(dev >= 0);
+
+ /* collect information required for bus rescan */
+ bus = openat(dev, "device/subsystem", O_DIRECTORY);
+ igt_assert(bus >= 0);
+
+ igt_debug("unplugging device\n");
+ device_unplug(dev);
+
+ igt_debug("trying to unload module\n");
+ igt_assert(!module_unload(chipset, module));
+
+ igt_debug("closing device\n");
+ close(fd);
+
+ igt_debug("unloading module\n");
+ igt_assert(module_unload(chipset, module));
+
+ igt_debug("recovering device\n");
+ bus_rescan(bus);
+
+ igt_debug("reopening driver\n");
+ fd = __drm_open_driver(chipset);
+ igt_assert(fd >= 0);
+
+ close(fd);
+}
+
+igt_main {
+ int chipset;
+ char *module;
+
+ igt_fixture {
+ char path[PATH_MAX];
+ int fd, dev, len;
+
+ /**
+ * Since some subtests depend on successful unload of a driver
+ * module, don't use drm_open_driver() as it keeps a device file
+ * descriptor open for exit handler use and that effectively
+ * prevents the module from being unloaded.
+ */
+ fd = __drm_open_driver(DRIVER_ANY);
+ igt_assert(fd >= 0);
+
+ if (is_i915_device(fd)) {
+ chipset = DRIVER_INTEL;
+ module = strdup("i915");
+ } else {
+ chipset = DRIVER_ANY;
+
+ /* Capture module name to be unloaded */
+ dev = igt_sysfs_open(fd);
+ len = readlinkat(dev, "device/driver/module", path,
+ sizeof(path) - 1);
+ close(dev);
+ path[len] = '\0';
+ module = strdup(strrchr(path, '/') + 1);
+ }
+ close(fd);
+
+ igt_info("Running the test on driver \"%s\", chipset mask %#0x\n",
+ module, chipset);
+ }
+
+ igt_subtest("unbind-rebind")
+ unbind_rebind(chipset);
+
+ igt_subtest("unplug-rescan")
+ unplug_rescan(chipset);
+
+ igt_subtest("drm_open-hotunplug")
+ drm_open_hotunplug(chipset);
+
+ igt_subtest("gem_buffer-hotunplug")
+ gem_buffer_hotunplug(chipset);
+
+ igt_subtest("gem_mmap-hotunplug")
+ gem_mmap_hotunplug(chipset);
+
+ igt_subtest("i915_context-hotunplug")
+ i915_context_hotunplug(chipset);
+
+ igt_subtest("i915-hotunplug-write")
+ i915_hotunplug_write(chipset);
+
+ igt_subtest("i915_spin-hotunplug")
+ i915_spin_hotunplug(chipset);
+
+ igt_subtest("drm-hotunplug-unload")
+ drm_hotunplug_unload(chipset, module);
+}
diff --git a/tests/meson.build b/tests/meson.build
index 711979b4..ff391c94 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -3,6 +3,7 @@ test_progs = [
'core_getclient',
'core_getstats',
'core_getversion',
+ 'core_hotunplug',
'core_setmaster_vs_auth',
'debugfs_test',
'drm_import_export',
--
2.20.1
More information about the Intel-gfx-trybot
mailing list