drivers/gpu/drm/i915/selftests/i915_gem_evict.c - linux-imx - Git at Google

 /*
  * 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 populate_ggtt(struct drm_i915_private *i915)
 {
 	struct drm_i915_gem_object *obj;
 	u64 size;

 	for (size = 0;
 	     size + I915_GTT_PAGE_SIZE <= i915->ggtt.base.total;
 	     size += I915_GTT_PAGE_SIZE) {
 		struct i915_vma *vma;

 		obj = i915_gem_object_create_internal(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))
 			return PTR_ERR(vma);
 	}

 	if (!list_empty(&i915->mm.unbound_list)) {
 		size = 0;
 		list_for_each_entry(obj, &i915->mm.unbound_list, global_link)
 			size++;

 		pr_err("Found %lld objects unbound!\n", size);
 		return -EINVAL;
 	}

 	if (list_empty(&i915->ggtt.base.inactive_list)) {
 		pr_err("No objects on the GGTT inactive list!\n");
 		return -EINVAL;
 	}

 	return 0;
 }

 static void unpin_ggtt(struct drm_i915_private *i915)
 {
 	struct i915_vma *vma;

 	list_for_each_entry(vma, &i915->ggtt.base.inactive_list, vm_link)
 		i915_vma_unpin(vma);
 }

 static void cleanup_objects(struct drm_i915_private *i915)
 {
 	struct drm_i915_gem_object *obj, *on;

 	list_for_each_entry_safe(obj, on, &i915->mm.unbound_list, global_link)
 		i915_gem_object_put(obj);

 	list_for_each_entry_safe(obj, on, &i915->mm.bound_list, global_link)
 		i915_gem_object_put(obj);

 	mutex_unlock(&i915->drm.struct_mutex);

 	i915_gem_drain_freed_objects(i915);

 	mutex_lock(&i915->drm.struct_mutex);
 }

 static int igt_evict_something(void *arg)
 {
 	struct drm_i915_private *i915 = arg;
 	struct i915_ggtt *ggtt = &i915->ggtt;
 	int err;

 	/* Fill the GGTT with pinned objects and try to evict one. */

 	err = populate_ggtt(i915);
 	if (err)
 		goto cleanup;

 	/* Everything is pinned, nothing should happen */
 	err = i915_gem_evict_something(&ggtt->base,
 				       I915_GTT_PAGE_SIZE, 0, 0,
 				       0, U64_MAX,
 				       0);
 	if (err != -ENOSPC) {
 		pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n",
 		       err);
 		goto cleanup;
 	}

 	unpin_ggtt(i915);

 	/* Everything is unpinned, we should be able to evict something */
 	err = i915_gem_evict_something(&ggtt->base,
 				       I915_GTT_PAGE_SIZE, 0, 0,
 				       0, U64_MAX,
 				       0);
 	if (err) {
 		pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n",
 		       err);
 		goto cleanup;
 	}

 cleanup:
 	cleanup_objects(i915);
 	return err;
 }

 static int igt_overcommit(void *arg)
 {
 	struct drm_i915_private *i915 = arg;
 	struct drm_i915_gem_object *obj;
 	struct i915_vma *vma;
 	int err;

 	/* Fill the GGTT with pinned objects and then try to pin one more.
 	 * We expect it to fail.
 	 */

 	err = populate_ggtt(i915);
 	if (err)
 		goto cleanup;

 	obj = i915_gem_object_create_internal(i915, I915_GTT_PAGE_SIZE);
 	if (IS_ERR(obj)) {
 		err = PTR_ERR(obj);
 		goto cleanup;
 	}

 	list_move(&obj->global_link, &i915->mm.unbound_list);

 	vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);
 	if (!IS_ERR(vma) || PTR_ERR(vma) != -ENOSPC) {
 		pr_err("Failed to evict+insert, i915_gem_object_ggtt_pin returned err=%d\n", (int)PTR_ERR(vma));
 		err = -EINVAL;
 		goto cleanup;
 	}

 cleanup:
 	cleanup_objects(i915);
 	return err;
 }

 static int igt_evict_for_vma(void *arg)
 {
 	struct drm_i915_private *i915 = arg;
 	struct i915_ggtt *ggtt = &i915->ggtt;
 	struct drm_mm_node target = {
 		.start = 0,
 		.size = 4096,
 	};
 	int err;

 	/* Fill the GGTT with pinned objects and try to evict a range. */

 	err = populate_ggtt(i915);
 	if (err)
 		goto cleanup;

 	/* Everything is pinned, nothing should happen */
 	err = i915_gem_evict_for_node(&ggtt->base, &target, 0);
 	if (err != -ENOSPC) {
 		pr_err("i915_gem_evict_for_node on a full GGTT returned err=%d\n",
 		       err);
 		goto cleanup;
 	}

 	unpin_ggtt(i915);

 	/* Everything is unpinned, we should be able to evict the node */
 	err = i915_gem_evict_for_node(&ggtt->base, &target, 0);
 	if (err) {
 		pr_err("i915_gem_evict_for_node returned err=%d\n",
 		       err);
 		goto cleanup;
 	}

 cleanup:
 	cleanup_objects(i915);
 	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 drm_i915_private *i915 = arg;
 	struct i915_ggtt *ggtt = &i915->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_CACHE_LLC,
 	};
 	struct drm_i915_gem_object *obj;
 	struct i915_vma *vma;
 	int err;

 	/* Currently the use of color_adjust is limited to cache domains within
 	 * the ggtt, and so the presence of mm.color_adjust is assumed to be
 	 * i915_gtt_color_adjust throughout our driver, so using a mock color
 	 * adjust will work just fine for our purposes.
 	 */
 	ggtt->base.mm.color_adjust = mock_color_adjust;

 	obj = i915_gem_object_create_internal(i915, I915_GTT_PAGE_SIZE);
 	if (IS_ERR(obj)) {
 		err = PTR_ERR(obj);
 		goto cleanup;
 	}
 	i915_gem_object_set_cache_level(obj, I915_CACHE_LLC);

 	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(i915, I915_GTT_PAGE_SIZE);
 	if (IS_ERR(obj)) {
 		err = PTR_ERR(obj);
 		goto cleanup;
 	}
 	i915_gem_object_set_cache_level(obj, I915_CACHE_LLC);

 	/* 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 */
 	err = i915_gem_evict_for_node(&ggtt->base, &target, 0);
 	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_CACHE_L3_LLC;

 	err = i915_gem_evict_for_node(&ggtt->base, &target, 0);
 	if (!err) {
 		pr_err("[1]i915_gem_evict_for_node returned err=%d\n", err);
 		err = -EINVAL;
 		goto cleanup;
 	}

 	err = 0;

 cleanup:
 	unpin_ggtt(i915);
 	cleanup_objects(i915);
 	ggtt->base.mm.color_adjust = NULL;
 	return err;
 }

 static int igt_evict_vm(void *arg)
 {
 	struct drm_i915_private *i915 = arg;
 	struct i915_ggtt *ggtt = &i915->ggtt;
 	int err;

 	/* Fill the GGTT with pinned objects and try to evict everything. */

 	err = populate_ggtt(i915);
 	if (err)
 		goto cleanup;

 	/* Everything is pinned, nothing should happen */
 	err = i915_gem_evict_vm(&ggtt->base);
 	if (err) {
 		pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n",
 		       err);
 		goto cleanup;
 	}

 	unpin_ggtt(i915);

 	err = i915_gem_evict_vm(&ggtt->base);
 	if (err) {
 		pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n",
 		       err);
 		goto cleanup;
 	}

 cleanup:
 	cleanup_objects(i915);
 	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;
 	int err;

 	i915 = mock_gem_device();
 	if (!i915)
 		return -ENOMEM;

 	mutex_lock(&i915->drm.struct_mutex);
 	err = i915_subtests(tests, i915);
 	mutex_unlock(&i915->drm.struct_mutex);

 	drm_dev_unref(&i915->drm);
 	return err;
 }
	/*
	* 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 populate_ggtt(struct drm_i915_private *i915)
	{
	struct drm_i915_gem_object *obj;
	u64 size;

	for (size = 0;
	size + I915_GTT_PAGE_SIZE <= i915->ggtt.base.total;
	size += I915_GTT_PAGE_SIZE) {
	struct i915_vma *vma;

	obj = i915_gem_object_create_internal(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))
	return PTR_ERR(vma);
	}

	if (!list_empty(&i915->mm.unbound_list)) {
	size = 0;
	list_for_each_entry(obj, &i915->mm.unbound_list, global_link)
	size++;

	pr_err("Found %lld objects unbound!\n", size);
	return -EINVAL;
	}

	if (list_empty(&i915->ggtt.base.inactive_list)) {
	pr_err("No objects on the GGTT inactive list!\n");
	return -EINVAL;
	}

	return 0;
	}

	static void unpin_ggtt(struct drm_i915_private *i915)
	{
	struct i915_vma *vma;

	list_for_each_entry(vma, &i915->ggtt.base.inactive_list, vm_link)
	i915_vma_unpin(vma);
	}

	static void cleanup_objects(struct drm_i915_private *i915)
	{
	struct drm_i915_gem_object obj, on;

	list_for_each_entry_safe(obj, on, &i915->mm.unbound_list, global_link)
	i915_gem_object_put(obj);

	list_for_each_entry_safe(obj, on, &i915->mm.bound_list, global_link)
	i915_gem_object_put(obj);

	mutex_unlock(&i915->drm.struct_mutex);

	i915_gem_drain_freed_objects(i915);

	mutex_lock(&i915->drm.struct_mutex);
	}

	static int igt_evict_something(void *arg)
	{
	struct drm_i915_private *i915 = arg;
	struct i915_ggtt *ggtt = &i915->ggtt;
	int err;

	/* Fill the GGTT with pinned objects and try to evict one. */

	err = populate_ggtt(i915);
	if (err)
	goto cleanup;

	/* Everything is pinned, nothing should happen */
	err = i915_gem_evict_something(&ggtt->base,
	I915_GTT_PAGE_SIZE, 0, 0,
	0, U64_MAX,
	0);
	if (err != -ENOSPC) {
	pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n",
	err);
	goto cleanup;
	}

	unpin_ggtt(i915);

	/* Everything is unpinned, we should be able to evict something */
	err = i915_gem_evict_something(&ggtt->base,
	I915_GTT_PAGE_SIZE, 0, 0,
	0, U64_MAX,
	0);
	if (err) {
	pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n",
	err);
	goto cleanup;
	}

	cleanup:
	cleanup_objects(i915);
	return err;
	}

	static int igt_overcommit(void *arg)
	{
	struct drm_i915_private *i915 = arg;
	struct drm_i915_gem_object *obj;
	struct i915_vma *vma;
	int err;

	/* Fill the GGTT with pinned objects and then try to pin one more.
	* We expect it to fail.
	*/

	err = populate_ggtt(i915);
	if (err)
	goto cleanup;

	obj = i915_gem_object_create_internal(i915, I915_GTT_PAGE_SIZE);
	if (IS_ERR(obj)) {
	err = PTR_ERR(obj);
	goto cleanup;
	}

	list_move(&obj->global_link, &i915->mm.unbound_list);

	vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);
	if (!IS_ERR(vma) \|\| PTR_ERR(vma) != -ENOSPC) {
	pr_err("Failed to evict+insert, i915_gem_object_ggtt_pin returned err=%d\n", (int)PTR_ERR(vma));
	err = -EINVAL;
	goto cleanup;
	}

	cleanup:
	cleanup_objects(i915);
	return err;
	}

	static int igt_evict_for_vma(void *arg)
	{
	struct drm_i915_private *i915 = arg;
	struct i915_ggtt *ggtt = &i915->ggtt;
	struct drm_mm_node target = {
	.start = 0,
	.size = 4096,
	};
	int err;

	/* Fill the GGTT with pinned objects and try to evict a range. */

	err = populate_ggtt(i915);
	if (err)
	goto cleanup;

	/* Everything is pinned, nothing should happen */
	err = i915_gem_evict_for_node(&ggtt->base, &target, 0);
	if (err != -ENOSPC) {
	pr_err("i915_gem_evict_for_node on a full GGTT returned err=%d\n",
	err);
	goto cleanup;
	}

	unpin_ggtt(i915);

	/* Everything is unpinned, we should be able to evict the node */
	err = i915_gem_evict_for_node(&ggtt->base, &target, 0);
	if (err) {
	pr_err("i915_gem_evict_for_node returned err=%d\n",
	err);
	goto cleanup;
	}

	cleanup:
	cleanup_objects(i915);
	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 drm_i915_private *i915 = arg;
	struct i915_ggtt *ggtt = &i915->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_CACHE_LLC,
	};
	struct drm_i915_gem_object *obj;
	struct i915_vma *vma;
	int err;

	/* Currently the use of color_adjust is limited to cache domains within
	* the ggtt, and so the presence of mm.color_adjust is assumed to be
	* i915_gtt_color_adjust throughout our driver, so using a mock color
	* adjust will work just fine for our purposes.
	*/
	ggtt->base.mm.color_adjust = mock_color_adjust;

	obj = i915_gem_object_create_internal(i915, I915_GTT_PAGE_SIZE);
	if (IS_ERR(obj)) {
	err = PTR_ERR(obj);
	goto cleanup;
	}
	i915_gem_object_set_cache_level(obj, I915_CACHE_LLC);

	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(i915, I915_GTT_PAGE_SIZE);
	if (IS_ERR(obj)) {
	err = PTR_ERR(obj);
	goto cleanup;
	}
	i915_gem_object_set_cache_level(obj, I915_CACHE_LLC);

	/* 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 */
	err = i915_gem_evict_for_node(&ggtt->base, &target, 0);
	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_CACHE_L3_LLC;

	err = i915_gem_evict_for_node(&ggtt->base, &target, 0);
	if (!err) {
	pr_err("[1]i915_gem_evict_for_node returned err=%d\n", err);
	err = -EINVAL;
	goto cleanup;
	}

	err = 0;

	cleanup:
	unpin_ggtt(i915);
	cleanup_objects(i915);
	ggtt->base.mm.color_adjust = NULL;
	return err;
	}

	static int igt_evict_vm(void *arg)
	{
	struct drm_i915_private *i915 = arg;
	struct i915_ggtt *ggtt = &i915->ggtt;
	int err;

	/* Fill the GGTT with pinned objects and try to evict everything. */

	err = populate_ggtt(i915);
	if (err)
	goto cleanup;

	/* Everything is pinned, nothing should happen */
	err = i915_gem_evict_vm(&ggtt->base);
	if (err) {
	pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n",
	err);
	goto cleanup;
	}

	unpin_ggtt(i915);

	err = i915_gem_evict_vm(&ggtt->base);
	if (err) {
	pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n",
	err);
	goto cleanup;
	}

	cleanup:
	cleanup_objects(i915);
	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;
	int err;

	i915 = mock_gem_device();
	if (!i915)
	return -ENOMEM;

	mutex_lock(&i915->drm.struct_mutex);
	err = i915_subtests(tests, i915);
	mutex_unlock(&i915->drm.struct_mutex);

	drm_dev_unref(&i915->drm);
	return err;
	}