Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 256 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/selftests/i915_gem.c b/drivers/gpu/drm/i915/selftests/i915_gem.c
new file mode 100644
index 000000000..e5dd82e7e
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/i915_gem.c
@@ -0,0 +1,256 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * Copyright © 2018 Intel Corporation
+ */
+
+#include <linux/random.h>
+
+#include "gem/i915_gem_internal.h"
+#include "gem/i915_gem_pm.h"
+#include "gem/selftests/igt_gem_utils.h"
+#include "gem/selftests/mock_context.h"
+#include "gt/intel_gt.h"
+#include "gt/intel_gt_pm.h"
+
+#include "i915_selftest.h"
+
+#include "igt_flush_test.h"
+#include "mock_drm.h"
+
+static int switch_to_context(struct i915_gem_context *ctx)
+{
+	struct i915_gem_engines_iter it;
+	struct intel_context *ce;
+	int err = 0;
+
+	for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) {
+		struct i915_request *rq;
+
+		rq = intel_context_create_request(ce);
+		if (IS_ERR(rq)) {
+			err = PTR_ERR(rq);
+			break;
+		}
+
+		i915_request_add(rq);
+	}
+	i915_gem_context_unlock_engines(ctx);
+
+	return err;
+}
+
+static void trash_stolen(struct drm_i915_private *i915)
+{
+	struct i915_ggtt *ggtt = to_gt(i915)->ggtt;
+	const u64 slot = ggtt->error_capture.start;
+	const resource_size_t size = resource_size(&i915->dsm);
+	unsigned long page;
+	u32 prng = 0x12345678;
+
+	/* XXX: fsck. needs some more thought... */
+	if (!i915_ggtt_has_aperture(ggtt))
+		return;
+
+	for (page = 0; page < size; page += PAGE_SIZE) {
+		const dma_addr_t dma = i915->dsm.start + page;
+		u32 __iomem *s;
+		int x;
+
+		ggtt->vm.insert_page(&ggtt->vm, dma, slot, I915_CACHE_NONE, 0);
+
+		s = io_mapping_map_atomic_wc(&ggtt->iomap, slot);
+		for (x = 0; x < PAGE_SIZE / sizeof(u32); x++) {
+			prng = next_pseudo_random32(prng);
+			iowrite32(prng, &s[x]);
+		}
+		io_mapping_unmap_atomic(s);
+	}
+
+	ggtt->vm.clear_range(&ggtt->vm, slot, PAGE_SIZE);
+}
+
+static void simulate_hibernate(struct drm_i915_private *i915)
+{
+	intel_wakeref_t wakeref;
+
+	wakeref = intel_runtime_pm_get(&i915->runtime_pm);
+
+	/*
+	 * As a final sting in the tail, invalidate stolen. Under a real S4,
+	 * stolen is lost and needs to be refilled on resume. However, under
+	 * CI we merely do S4-device testing (as full S4 is too unreliable
+	 * for automated testing across a cluster), so to simulate the effect
+	 * of stolen being trashed across S4, we trash it ourselves.
+	 */
+	trash_stolen(i915);
+
+	intel_runtime_pm_put(&i915->runtime_pm, wakeref);
+}
+
+static int igt_pm_prepare(struct drm_i915_private *i915)
+{
+	i915_gem_suspend(i915);
+
+	return 0;
+}
+
+static void igt_pm_suspend(struct drm_i915_private *i915)
+{
+	intel_wakeref_t wakeref;
+
+	with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
+		i915_ggtt_suspend(to_gt(i915)->ggtt);
+		i915_gem_suspend_late(i915);
+	}
+}
+
+static void igt_pm_hibernate(struct drm_i915_private *i915)
+{
+	intel_wakeref_t wakeref;
+
+	with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
+		i915_ggtt_suspend(to_gt(i915)->ggtt);
+
+		i915_gem_freeze(i915);
+		i915_gem_freeze_late(i915);
+	}
+}
+
+static void igt_pm_resume(struct drm_i915_private *i915)
+{
+	intel_wakeref_t wakeref;
+
+	/*
+	 * Both suspend and hibernate follow the same wakeup path and assume
+	 * that runtime-pm just works.
+	 */
+	with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
+		i915_ggtt_resume(to_gt(i915)->ggtt);
+		i915_gem_resume(i915);
+	}
+}
+
+static int igt_gem_suspend(void *arg)
+{
+	struct drm_i915_private *i915 = arg;
+	struct i915_gem_context *ctx;
+	struct file *file;
+	int err;
+
+	file = mock_file(i915);
+	if (IS_ERR(file))
+		return PTR_ERR(file);
+
+	err = -ENOMEM;
+	ctx = live_context(i915, file);
+	if (!IS_ERR(ctx))
+		err = switch_to_context(ctx);
+	if (err)
+		goto out;
+
+	err = igt_pm_prepare(i915);
+	if (err)
+		goto out;
+
+	igt_pm_suspend(i915);
+
+	/* Here be dragons! Note that with S3RST any S3 may become S4! */
+	simulate_hibernate(i915);
+
+	igt_pm_resume(i915);
+
+	err = switch_to_context(ctx);
+out:
+	fput(file);
+	return err;
+}
+
+static int igt_gem_hibernate(void *arg)
+{
+	struct drm_i915_private *i915 = arg;
+	struct i915_gem_context *ctx;
+	struct file *file;
+	int err;
+
+	file = mock_file(i915);
+	if (IS_ERR(file))
+		return PTR_ERR(file);
+
+	err = -ENOMEM;
+	ctx = live_context(i915, file);
+	if (!IS_ERR(ctx))
+		err = switch_to_context(ctx);
+	if (err)
+		goto out;
+
+	err = igt_pm_prepare(i915);
+	if (err)
+		goto out;
+
+	igt_pm_hibernate(i915);
+
+	/* Here be dragons! */
+	simulate_hibernate(i915);
+
+	igt_pm_resume(i915);
+
+	err = switch_to_context(ctx);
+out:
+	fput(file);
+	return err;
+}
+
+static int igt_gem_ww_ctx(void *arg)
+{
+	struct drm_i915_private *i915 = arg;
+	struct drm_i915_gem_object *obj, *obj2;
+	struct i915_gem_ww_ctx ww;
+	int err = 0;
+
+	obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
+	if (IS_ERR(obj))
+		return PTR_ERR(obj);
+
+	obj2 = i915_gem_object_create_internal(i915, PAGE_SIZE);
+	if (IS_ERR(obj2)) {
+		err = PTR_ERR(obj2);
+		goto put1;
+	}
+
+	i915_gem_ww_ctx_init(&ww, true);
+retry:
+	/* Lock the objects, twice for good measure (-EALREADY handling) */
+	err = i915_gem_object_lock(obj, &ww);
+	if (!err)
+		err = i915_gem_object_lock_interruptible(obj, &ww);
+	if (!err)
+		err = i915_gem_object_lock_interruptible(obj2, &ww);
+	if (!err)
+		err = i915_gem_object_lock(obj2, &ww);
+
+	if (err == -EDEADLK) {
+		err = i915_gem_ww_ctx_backoff(&ww);
+		if (!err)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
+	i915_gem_object_put(obj2);
+put1:
+	i915_gem_object_put(obj);
+	return err;
+}
+
+int i915_gem_live_selftests(struct drm_i915_private *i915)
+{
+	static const struct i915_subtest tests[] = {
+		SUBTEST(igt_gem_suspend),
+		SUBTEST(igt_gem_hibernate),
+		SUBTEST(igt_gem_ww_ctx),
+	};
+
+	if (intel_gt_is_wedged(to_gt(i915)))
+		return 0;
+
+	return i915_live_subtests(tests, i915);
+}