From 953c7f82eb890085c60dbe22578e883d6837c674 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 13 Feb 2017 17:15:12 +0000 Subject: drm/i915: Provide a hook for selftests Some pieces of code are independent of hardware but are very tricky to exercise through the normal userspace ABI or via debugfs hooks. Being able to create mock unit tests and execute them through CI is vital. Start by adding a central point where we can execute unit tests and a parameter to enable them. This is disabled by default as the expectation is that these tests will occasionally explode. To facilitate integration with igt, any parameter beginning with i915.igt__ is interpreted as a subtest executable independently via igt/drv_selftest. Two classes of selftests are recognised: mock unit tests and integration tests. Mock unit tests are run as soon as the module is loaded, before the device is probed. At that point there is no driver instantiated and all hw interactions must be "mocked". This is very useful for writing universal tests to exercise code not typically run on a broad range of architectures. Alternatively, you can hook into the live selftests and run when the device has been instantiated - hw interactions are real. v2: Add a macro for compiling conditional code for mock objects inside real objects. v3: Differentiate between mock unit tests and late integration test. v4: List the tests in natural order, use igt to sort after modparam. v5: s/late/live/ v6: s/unsigned long/unsigned int/ v7: Use igt_ prefixes for long helpers. v8: Deobfuscate macros overriding functions, stop using -I$(src) Signed-off-by: Chris Wilson Reviewed-by: Tvrtko Ursulin Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-1-chris@chris-wilson.co.uk --- tools/testing/selftests/drivers/gpu/i915.sh | 1 + 1 file changed, 1 insertion(+) (limited to 'tools') diff --git a/tools/testing/selftests/drivers/gpu/i915.sh b/tools/testing/selftests/drivers/gpu/i915.sh index d407f0fa1e3a..c06d6e8a8dcc 100755 --- a/tools/testing/selftests/drivers/gpu/i915.sh +++ b/tools/testing/selftests/drivers/gpu/i915.sh @@ -7,6 +7,7 @@ if ! /sbin/modprobe -q -r i915; then fi if /sbin/modprobe -q i915 mock_selftests=-1; then + /sbin/modprobe -q -r i915 echo "drivers/gpu/i915: ok" else echo "drivers/gpu/i915: [FAIL]" -- cgit v1.2.3