drm/i915: Add selftests for object allocation, phys

The phys object is a rarely used device (only very old machines require
a chunk of physically contiguous pages for a few hardware interactions).
As such, it is not exercised by CI and to combat that we want to add a
test that exercises the phys object on all platforms.

v2: Always set err on error paths and not rely on inheriting the err.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-17-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 59e10b3..ec455f4 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -5025,4 +5025,5 @@ i915_gem_object_get_dma_address(struct drm_i915_gem_object *obj,
 #include "selftests/scatterlist.c"
 #include "selftests/mock_gem_device.c"
 #include "selftests/huge_gem_object.c"
+#include "selftests/i915_gem_object.c"
 #endif

diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_object.c b/drivers/gpu/drm/i915/selftests/i915_gem_object.c
new file mode 100644 (file)
index 0000000..0d76c5e
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_object.c
@@ -0,0 +1,120 @@
+/*
+ * 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 "../i915_selftest.h"
+
+#include "mock_gem_device.h"
+
+static int igt_gem_object(void *arg)
+{
+       struct drm_i915_private *i915 = arg;
+       struct drm_i915_gem_object *obj;
+       int err = -ENOMEM;
+
+       /* Basic test to ensure we can create an object */
+
+       obj = i915_gem_object_create(i915, PAGE_SIZE);
+       if (IS_ERR(obj)) {
+               err = PTR_ERR(obj);
+               pr_err("i915_gem_object_create failed, err=%d\n", err);
+               goto out;
+       }
+
+       err = 0;
+       i915_gem_object_put(obj);
+out:
+       return err;
+}
+
+static int igt_phys_object(void *arg)
+{
+       struct drm_i915_private *i915 = arg;
+       struct drm_i915_gem_object *obj;
+       int err;
+
+       /* Create an object and bind it to a contiguous set of physical pages,
+        * i.e. exercise the i915_gem_object_phys API.
+        */
+
+       obj = i915_gem_object_create(i915, PAGE_SIZE);
+       if (IS_ERR(obj)) {
+               err = PTR_ERR(obj);
+               pr_err("i915_gem_object_create failed, err=%d\n", err);
+               goto out;
+       }
+
+       mutex_lock(&i915->drm.struct_mutex);
+       err = i915_gem_object_attach_phys(obj, PAGE_SIZE);
+       mutex_unlock(&i915->drm.struct_mutex);
+       if (err) {
+               pr_err("i915_gem_object_attach_phys failed, err=%d\n", err);
+               goto out_obj;
+       }
+
+       if (obj->ops != &i915_gem_phys_ops) {
+               pr_err("i915_gem_object_attach_phys did not create a phys object\n");
+               err = -EINVAL;
+               goto out_obj;
+       }
+
+       if (!atomic_read(&obj->mm.pages_pin_count)) {
+               pr_err("i915_gem_object_attach_phys did not pin its phys pages\n");
+               err = -EINVAL;
+               goto out_obj;
+       }
+
+       /* Make the object dirty so that put_pages must do copy back the data */
+       mutex_lock(&i915->drm.struct_mutex);
+       err = i915_gem_object_set_to_gtt_domain(obj, true);
+       mutex_unlock(&i915->drm.struct_mutex);
+       if (err) {
+               pr_err("i915_gem_object_set_to_gtt_domain failed with err=%d\n",
+                      err);
+               goto out_obj;
+       }
+
+out_obj:
+       i915_gem_object_put(obj);
+out:
+       return err;
+}
+
+int i915_gem_object_mock_selftests(void)
+{
+       static const struct i915_subtest tests[] = {
+               SUBTEST(igt_gem_object),
+               SUBTEST(igt_phys_object),
+       };
+       struct drm_i915_private *i915;
+       int err;
+
+       i915 = mock_gem_device();
+       if (!i915)
+               return -ENOMEM;
+
+       err = i915_subtests(tests, i915);
+
+       drm_dev_unref(&i915->drm);
+       return err;
+}

diff --git a/drivers/gpu/drm/i915/selftests/i915_mock_selftests.h b/drivers/gpu/drm/i915/selftests/i915_mock_selftests.h
index bda9824..2ed94e3 100644 (file)
--- a/drivers/gpu/drm/i915/selftests/i915_mock_selftests.h
+++ b/drivers/gpu/drm/i915/selftests/i915_mock_selftests.h
@@ -12,3 +12,4 @@ selftest(sanitycheck, i915_mock_sanitycheck) /* keep first (igt selfcheck) */
 selftest(scatterlist, scatterlist_mock_selftests)
 selftest(breadcrumbs, intel_breadcrumbs_mock_selftests)
 selftest(requests, i915_gem_request_mock_selftests)
+selftest(objects, i915_gem_object_mock_selftests)