Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 571 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_evict.c b/drivers/gpu/drm/i915/selftests/i915_gem_evict.c
new file mode 100644
index 0000000000..f8fe3681c3
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_evict.c
@@ -0,0 +1,571 @@
+/*
+ * 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 "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_print.h"
+
+#include "i915_selftest.h"
+
+#include "igt_flush_test.h"
+#include "lib_sw_fence.h"
+#include "mock_drm.h"
+#include "mock_gem_device.h"
+
+static void quirk_add(struct drm_i915_gem_object *obj,
+		      struct list_head *objects)
+{
+	/* quirk is only for live tiled objects, use it to declare ownership */
+	GEM_BUG_ON(i915_gem_object_has_tiling_quirk(obj));
+	i915_gem_object_set_tiling_quirk(obj);
+	list_add(&obj->st_link, objects);
+}
+
+static int populate_ggtt(struct i915_ggtt *ggtt, struct list_head *objects)
+{
+	struct drm_i915_gem_object *obj;
+	unsigned long count;
+
+	count = 0;
+	do {
+		struct i915_vma *vma;
+
+		obj = i915_gem_object_create_internal(ggtt->vm.i915,
+						      I915_GTT_PAGE_SIZE);
+		if (IS_ERR(obj))
+			return PTR_ERR(obj);
+
+		vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);
+		if (IS_ERR(vma)) {
+			i915_gem_object_put(obj);
+			if (vma == ERR_PTR(-ENOSPC))
+				break;
+
+			return PTR_ERR(vma);
+		}
+
+		quirk_add(obj, objects);
+		count++;
+	} while (1);
+	pr_debug("Filled GGTT with %lu pages [%llu total]\n",
+		 count, ggtt->vm.total / PAGE_SIZE);
+
+	if (list_empty(&ggtt->vm.bound_list)) {
+		pr_err("No objects on the GGTT inactive list!\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void unpin_ggtt(struct i915_ggtt *ggtt)
+{
+	struct i915_vma *vma;
+
+	list_for_each_entry(vma, &ggtt->vm.bound_list, vm_link)
+		if (i915_gem_object_has_tiling_quirk(vma->obj))
+			i915_vma_unpin(vma);
+}
+
+static void cleanup_objects(struct i915_ggtt *ggtt, struct list_head *list)
+{
+	struct drm_i915_gem_object *obj, *on;
+
+	list_for_each_entry_safe(obj, on, list, st_link) {
+		GEM_BUG_ON(!i915_gem_object_has_tiling_quirk(obj));
+		i915_gem_object_set_tiling_quirk(obj);
+		i915_gem_object_put(obj);
+	}
+
+	i915_gem_drain_freed_objects(ggtt->vm.i915);
+}
+
+static int igt_evict_something(void *arg)
+{
+	struct intel_gt *gt = arg;
+	struct i915_ggtt *ggtt = gt->ggtt;
+	LIST_HEAD(objects);
+	int err;
+
+	/* Fill the GGTT with pinned objects and try to evict one. */
+
+	err = populate_ggtt(ggtt, &objects);
+	if (err)
+		goto cleanup;
+
+	/* Everything is pinned, nothing should happen */
+	mutex_lock(&ggtt->vm.mutex);
+	err = i915_gem_evict_something(&ggtt->vm, NULL,
+				       I915_GTT_PAGE_SIZE, 0, 0,
+				       0, U64_MAX,
+				       0);
+	mutex_unlock(&ggtt->vm.mutex);
+	if (err != -ENOSPC) {
+		pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n",
+		       err);
+		goto cleanup;
+	}
+
+	unpin_ggtt(ggtt);
+
+	/* Everything is unpinned, we should be able to evict something */
+	mutex_lock(&ggtt->vm.mutex);
+	err = i915_gem_evict_something(&ggtt->vm, NULL,
+				       I915_GTT_PAGE_SIZE, 0, 0,
+				       0, U64_MAX,
+				       0);
+	mutex_unlock(&ggtt->vm.mutex);
+	if (err) {
+		pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n",
+		       err);
+		goto cleanup;
+	}
+
+cleanup:
+	cleanup_objects(ggtt, &objects);
+	return err;
+}
+
+static int igt_overcommit(void *arg)
+{
+	struct intel_gt *gt = arg;
+	struct i915_ggtt *ggtt = gt->ggtt;
+	struct drm_i915_gem_object *obj;
+	struct i915_vma *vma;
+	LIST_HEAD(objects);
+	int err;
+
+	/* Fill the GGTT with pinned objects and then try to pin one more.
+	 * We expect it to fail.
+	 */
+
+	err = populate_ggtt(ggtt, &objects);
+	if (err)
+		goto cleanup;
+
+	obj = i915_gem_object_create_internal(gt->i915, I915_GTT_PAGE_SIZE);
+	if (IS_ERR(obj)) {
+		err = PTR_ERR(obj);
+		goto cleanup;
+	}
+
+	quirk_add(obj, &objects);
+
+	vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);
+	if (vma != ERR_PTR(-ENOSPC)) {
+		pr_err("Failed to evict+insert, i915_gem_object_ggtt_pin returned err=%d\n", (int)PTR_ERR_OR_ZERO(vma));
+		err = -EINVAL;
+		goto cleanup;
+	}
+
+cleanup:
+	cleanup_objects(ggtt, &objects);
+	return err;
+}
+
+static int igt_evict_for_vma(void *arg)
+{
+	struct intel_gt *gt = arg;
+	struct i915_ggtt *ggtt = gt->ggtt;
+	struct drm_mm_node target = {
+		.start = 0,
+		.size = 4096,
+	};
+	LIST_HEAD(objects);
+	int err;
+
+	/* Fill the GGTT with pinned objects and try to evict a range. */
+
+	err = populate_ggtt(ggtt, &objects);
+	if (err)
+		goto cleanup;
+
+	/* Everything is pinned, nothing should happen */
+	mutex_lock(&ggtt->vm.mutex);
+	err = i915_gem_evict_for_node(&ggtt->vm, NULL, &target, 0);
+	mutex_unlock(&ggtt->vm.mutex);
+	if (err != -ENOSPC) {
+		pr_err("i915_gem_evict_for_node on a full GGTT returned err=%d\n",
+		       err);
+		goto cleanup;
+	}
+
+	unpin_ggtt(ggtt);
+
+	/* Everything is unpinned, we should be able to evict the node */
+	mutex_lock(&ggtt->vm.mutex);
+	err = i915_gem_evict_for_node(&ggtt->vm, NULL, &target, 0);
+	mutex_unlock(&ggtt->vm.mutex);
+	if (err) {
+		pr_err("i915_gem_evict_for_node returned err=%d\n",
+		       err);
+		goto cleanup;
+	}
+
+cleanup:
+	cleanup_objects(ggtt, &objects);
+	return err;
+}
+
+static void mock_color_adjust(const struct drm_mm_node *node,
+			      unsigned long color,
+			      u64 *start,
+			      u64 *end)
+{
+}
+
+static int igt_evict_for_cache_color(void *arg)
+{
+	struct intel_gt *gt = arg;
+	struct i915_ggtt *ggtt = gt->ggtt;
+	const unsigned long flags = PIN_OFFSET_FIXED;
+	struct drm_mm_node target = {
+		.start = I915_GTT_PAGE_SIZE * 2,
+		.size = I915_GTT_PAGE_SIZE,
+		.color = i915_gem_get_pat_index(gt->i915, I915_CACHE_LLC),
+	};
+	struct drm_i915_gem_object *obj;
+	struct i915_vma *vma;
+	LIST_HEAD(objects);
+	int err;
+
+	/*
+	 * Currently the use of color_adjust for the GGTT is limited to cache
+	 * coloring and guard pages, and so the presence of mm.color_adjust for
+	 * the GGTT is assumed to be i915_ggtt_color_adjust, hence using a mock
+	 * color adjust will work just fine for our purposes.
+	 */
+	ggtt->vm.mm.color_adjust = mock_color_adjust;
+	GEM_BUG_ON(!i915_vm_has_cache_coloring(&ggtt->vm));
+
+	obj = i915_gem_object_create_internal(gt->i915, I915_GTT_PAGE_SIZE);
+	if (IS_ERR(obj)) {
+		err = PTR_ERR(obj);
+		goto cleanup;
+	}
+	i915_gem_object_set_cache_coherency(obj, I915_CACHE_LLC);
+	quirk_add(obj, &objects);
+
+	vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0,
+				       I915_GTT_PAGE_SIZE | flags);
+	if (IS_ERR(vma)) {
+		pr_err("[0]i915_gem_object_ggtt_pin failed\n");
+		err = PTR_ERR(vma);
+		goto cleanup;
+	}
+
+	obj = i915_gem_object_create_internal(gt->i915, I915_GTT_PAGE_SIZE);
+	if (IS_ERR(obj)) {
+		err = PTR_ERR(obj);
+		goto cleanup;
+	}
+	i915_gem_object_set_cache_coherency(obj, I915_CACHE_LLC);
+	quirk_add(obj, &objects);
+
+	/* Neighbouring; same colour - should fit */
+	vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0,
+				       (I915_GTT_PAGE_SIZE * 2) | flags);
+	if (IS_ERR(vma)) {
+		pr_err("[1]i915_gem_object_ggtt_pin failed\n");
+		err = PTR_ERR(vma);
+		goto cleanup;
+	}
+
+	i915_vma_unpin(vma);
+
+	/* Remove just the second vma */
+	mutex_lock(&ggtt->vm.mutex);
+	err = i915_gem_evict_for_node(&ggtt->vm, NULL, &target, 0);
+	mutex_unlock(&ggtt->vm.mutex);
+	if (err) {
+		pr_err("[0]i915_gem_evict_for_node returned err=%d\n", err);
+		goto cleanup;
+	}
+
+	/* Attempt to remove the first *pinned* vma, by removing the (empty)
+	 * neighbour -- this should fail.
+	 */
+	target.color = i915_gem_get_pat_index(gt->i915, I915_CACHE_L3_LLC);
+
+	mutex_lock(&ggtt->vm.mutex);
+	err = i915_gem_evict_for_node(&ggtt->vm, NULL, &target, 0);
+	mutex_unlock(&ggtt->vm.mutex);
+	if (!err) {
+		pr_err("[1]i915_gem_evict_for_node returned err=%d\n", err);
+		err = -EINVAL;
+		goto cleanup;
+	}
+
+	err = 0;
+
+cleanup:
+	unpin_ggtt(ggtt);
+	cleanup_objects(ggtt, &objects);
+	ggtt->vm.mm.color_adjust = NULL;
+	return err;
+}
+
+static int igt_evict_vm(void *arg)
+{
+	struct intel_gt *gt = arg;
+	struct i915_ggtt *ggtt = gt->ggtt;
+	struct i915_gem_ww_ctx ww;
+	LIST_HEAD(objects);
+	int err;
+
+	/* Fill the GGTT with pinned objects and try to evict everything. */
+
+	err = populate_ggtt(ggtt, &objects);
+	if (err)
+		goto cleanup;
+
+	/* Everything is pinned, nothing should happen */
+	mutex_lock(&ggtt->vm.mutex);
+	err = i915_gem_evict_vm(&ggtt->vm, NULL, NULL);
+	mutex_unlock(&ggtt->vm.mutex);
+	if (err) {
+		pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n",
+		       err);
+		goto cleanup;
+	}
+
+	unpin_ggtt(ggtt);
+
+	for_i915_gem_ww(&ww, err, false) {
+		mutex_lock(&ggtt->vm.mutex);
+		err = i915_gem_evict_vm(&ggtt->vm, &ww, NULL);
+		mutex_unlock(&ggtt->vm.mutex);
+	}
+
+	if (err) {
+		pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n",
+		       err);
+		goto cleanup;
+	}
+
+cleanup:
+	cleanup_objects(ggtt, &objects);
+	return err;
+}
+
+static int igt_evict_contexts(void *arg)
+{
+	const u64 PRETEND_GGTT_SIZE = 16ull << 20;
+	struct intel_gt *gt = arg;
+	struct i915_ggtt *ggtt = gt->ggtt;
+	struct drm_i915_private *i915 = gt->i915;
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+	struct reserved {
+		struct drm_mm_node node;
+		struct reserved *next;
+	} *reserved = NULL;
+	intel_wakeref_t wakeref;
+	struct drm_mm_node hole;
+	unsigned long count;
+	int err;
+
+	/*
+	 * The purpose of this test is to verify that we will trigger an
+	 * eviction in the GGTT when constructing a request that requires
+	 * additional space in the GGTT for pinning the context. This space
+	 * is not directly tied to the request so reclaiming it requires
+	 * extra work.
+	 *
+	 * As such this test is only meaningful for full-ppgtt environments
+	 * where the GTT space of the request is separate from the GGTT
+	 * allocation required to build the request.
+	 */
+	if (!HAS_FULL_PPGTT(i915))
+		return 0;
+
+	wakeref = intel_runtime_pm_get(&i915->runtime_pm);
+
+	/* Reserve a block so that we know we have enough to fit a few rq */
+	memset(&hole, 0, sizeof(hole));
+	mutex_lock(&ggtt->vm.mutex);
+	err = i915_gem_gtt_insert(&ggtt->vm, NULL, &hole,
+				  PRETEND_GGTT_SIZE, 0, I915_COLOR_UNEVICTABLE,
+				  0, ggtt->vm.total,
+				  PIN_NOEVICT);
+	if (err)
+		goto out_locked;
+
+	/* Make the GGTT appear small by filling it with unevictable nodes */
+	count = 0;
+	do {
+		struct reserved *r;
+
+		mutex_unlock(&ggtt->vm.mutex);
+		r = kcalloc(1, sizeof(*r), GFP_KERNEL);
+		mutex_lock(&ggtt->vm.mutex);
+		if (!r) {
+			err = -ENOMEM;
+			goto out_locked;
+		}
+
+		if (i915_gem_gtt_insert(&ggtt->vm, NULL, &r->node,
+					1ul << 20, 0, I915_COLOR_UNEVICTABLE,
+					0, ggtt->vm.total,
+					PIN_NOEVICT)) {
+			kfree(r);
+			break;
+		}
+
+		r->next = reserved;
+		reserved = r;
+
+		count++;
+	} while (1);
+	drm_mm_remove_node(&hole);
+	mutex_unlock(&ggtt->vm.mutex);
+	pr_info("Filled GGTT with %lu 1MiB nodes\n", count);
+
+	/* Overfill the GGTT with context objects and so try to evict one. */
+	for_each_engine(engine, gt, id) {
+		struct i915_sw_fence fence;
+		struct i915_request *last = NULL;
+
+		count = 0;
+		onstack_fence_init(&fence);
+		do {
+			struct intel_context *ce;
+			struct i915_request *rq;
+
+			ce = intel_context_create(engine);
+			if (IS_ERR(ce))
+				break;
+
+			/* We will need some GGTT space for the rq's context */
+			igt_evict_ctl.fail_if_busy = true;
+			rq = intel_context_create_request(ce);
+			igt_evict_ctl.fail_if_busy = false;
+			intel_context_put(ce);
+
+			if (IS_ERR(rq)) {
+				/* When full, fail_if_busy will trigger EBUSY */
+				if (PTR_ERR(rq) != -EBUSY) {
+					pr_err("Unexpected error from request alloc (on %s): %d\n",
+					       engine->name,
+					       (int)PTR_ERR(rq));
+					err = PTR_ERR(rq);
+				}
+				break;
+			}
+
+			/* Keep every request/ctx pinned until we are full */
+			err = i915_sw_fence_await_sw_fence_gfp(&rq->submit,
+							       &fence,
+							       GFP_KERNEL);
+			if (err < 0)
+				break;
+
+			i915_request_add(rq);
+			count++;
+			if (last)
+				i915_request_put(last);
+			last = i915_request_get(rq);
+			err = 0;
+		} while(1);
+		onstack_fence_fini(&fence);
+		pr_info("Submitted %lu contexts/requests on %s\n",
+			count, engine->name);
+		if (err)
+			break;
+		if (last) {
+			if (i915_request_wait(last, 0, HZ) < 0) {
+				err = -EIO;
+				i915_request_put(last);
+				pr_err("Failed waiting for last request (on %s)",
+				       engine->name);
+				break;
+			}
+			i915_request_put(last);
+		}
+		err = intel_gt_wait_for_idle(engine->gt, HZ * 3);
+		if (err) {
+			gt_err(engine->gt, "Failed to idle GT (on %s)",
+			       engine->name);
+			break;
+		}
+	}
+
+	mutex_lock(&ggtt->vm.mutex);
+out_locked:
+	if (igt_flush_test(i915))
+		err = -EIO;
+	while (reserved) {
+		struct reserved *next = reserved->next;
+
+		drm_mm_remove_node(&reserved->node);
+		kfree(reserved);
+
+		reserved = next;
+	}
+	if (drm_mm_node_allocated(&hole))
+		drm_mm_remove_node(&hole);
+	mutex_unlock(&ggtt->vm.mutex);
+	intel_runtime_pm_put(&i915->runtime_pm, wakeref);
+
+	return err;
+}
+
+int i915_gem_evict_mock_selftests(void)
+{
+	static const struct i915_subtest tests[] = {
+		SUBTEST(igt_evict_something),
+		SUBTEST(igt_evict_for_vma),
+		SUBTEST(igt_evict_for_cache_color),
+		SUBTEST(igt_evict_vm),
+		SUBTEST(igt_overcommit),
+	};
+	struct drm_i915_private *i915;
+	intel_wakeref_t wakeref;
+	int err = 0;
+
+	i915 = mock_gem_device();
+	if (!i915)
+		return -ENOMEM;
+
+	with_intel_runtime_pm(&i915->runtime_pm, wakeref)
+		err = i915_subtests(tests, to_gt(i915));
+
+	mock_destroy_device(i915);
+	return err;
+}
+
+int i915_gem_evict_live_selftests(struct drm_i915_private *i915)
+{
+	static const struct i915_subtest tests[] = {
+		SUBTEST(igt_evict_contexts),
+	};
+
+	if (intel_gt_is_wedged(to_gt(i915)))
+		return 0;
+
+	return intel_gt_live_subtests(tests, to_gt(i915));
+}