570 lines
14 KiB
C
570 lines
14 KiB
C
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/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#include "gem/i915_gem_internal.h"
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#include "gem/i915_gem_pm.h"
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#include "gem/selftests/igt_gem_utils.h"
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#include "gem/selftests/mock_context.h"
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#include "gt/intel_gt.h"
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#include "i915_selftest.h"
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#include "igt_flush_test.h"
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#include "lib_sw_fence.h"
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#include "mock_drm.h"
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#include "mock_gem_device.h"
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static void quirk_add(struct drm_i915_gem_object *obj,
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struct list_head *objects)
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{
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/* quirk is only for live tiled objects, use it to declare ownership */
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GEM_BUG_ON(i915_gem_object_has_tiling_quirk(obj));
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i915_gem_object_set_tiling_quirk(obj);
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list_add(&obj->st_link, objects);
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}
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static int populate_ggtt(struct i915_ggtt *ggtt, struct list_head *objects)
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{
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struct drm_i915_gem_object *obj;
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unsigned long count;
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count = 0;
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do {
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struct i915_vma *vma;
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obj = i915_gem_object_create_internal(ggtt->vm.i915,
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I915_GTT_PAGE_SIZE);
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if (IS_ERR(obj))
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return PTR_ERR(obj);
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vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);
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if (IS_ERR(vma)) {
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i915_gem_object_put(obj);
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if (vma == ERR_PTR(-ENOSPC))
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break;
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return PTR_ERR(vma);
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}
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quirk_add(obj, objects);
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count++;
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} while (1);
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pr_debug("Filled GGTT with %lu pages [%llu total]\n",
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count, ggtt->vm.total / PAGE_SIZE);
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if (list_empty(&ggtt->vm.bound_list)) {
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pr_err("No objects on the GGTT inactive list!\n");
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return -EINVAL;
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}
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return 0;
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}
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static void unpin_ggtt(struct i915_ggtt *ggtt)
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{
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struct i915_vma *vma;
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list_for_each_entry(vma, &ggtt->vm.bound_list, vm_link)
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if (i915_gem_object_has_tiling_quirk(vma->obj))
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i915_vma_unpin(vma);
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}
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static void cleanup_objects(struct i915_ggtt *ggtt, struct list_head *list)
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{
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struct drm_i915_gem_object *obj, *on;
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list_for_each_entry_safe(obj, on, list, st_link) {
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GEM_BUG_ON(!i915_gem_object_has_tiling_quirk(obj));
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i915_gem_object_set_tiling_quirk(obj);
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i915_gem_object_put(obj);
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}
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i915_gem_drain_freed_objects(ggtt->vm.i915);
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}
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static int igt_evict_something(void *arg)
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{
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struct intel_gt *gt = arg;
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struct i915_ggtt *ggtt = gt->ggtt;
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LIST_HEAD(objects);
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int err;
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/* Fill the GGTT with pinned objects and try to evict one. */
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err = populate_ggtt(ggtt, &objects);
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if (err)
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goto cleanup;
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/* Everything is pinned, nothing should happen */
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mutex_lock(&ggtt->vm.mutex);
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err = i915_gem_evict_something(&ggtt->vm, NULL,
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I915_GTT_PAGE_SIZE, 0, 0,
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0, U64_MAX,
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0);
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mutex_unlock(&ggtt->vm.mutex);
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if (err != -ENOSPC) {
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pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n",
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err);
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goto cleanup;
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}
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unpin_ggtt(ggtt);
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/* Everything is unpinned, we should be able to evict something */
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mutex_lock(&ggtt->vm.mutex);
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err = i915_gem_evict_something(&ggtt->vm, NULL,
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I915_GTT_PAGE_SIZE, 0, 0,
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0, U64_MAX,
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0);
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mutex_unlock(&ggtt->vm.mutex);
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if (err) {
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pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n",
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err);
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goto cleanup;
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}
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cleanup:
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cleanup_objects(ggtt, &objects);
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return err;
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}
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static int igt_overcommit(void *arg)
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{
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struct intel_gt *gt = arg;
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struct i915_ggtt *ggtt = gt->ggtt;
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struct drm_i915_gem_object *obj;
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struct i915_vma *vma;
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LIST_HEAD(objects);
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int err;
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/* Fill the GGTT with pinned objects and then try to pin one more.
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* We expect it to fail.
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*/
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err = populate_ggtt(ggtt, &objects);
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if (err)
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goto cleanup;
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obj = i915_gem_object_create_internal(gt->i915, I915_GTT_PAGE_SIZE);
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if (IS_ERR(obj)) {
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err = PTR_ERR(obj);
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goto cleanup;
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}
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quirk_add(obj, &objects);
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vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);
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if (vma != ERR_PTR(-ENOSPC)) {
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pr_err("Failed to evict+insert, i915_gem_object_ggtt_pin returned err=%d\n", (int)PTR_ERR_OR_ZERO(vma));
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err = -EINVAL;
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goto cleanup;
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}
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cleanup:
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cleanup_objects(ggtt, &objects);
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return err;
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}
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static int igt_evict_for_vma(void *arg)
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{
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struct intel_gt *gt = arg;
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struct i915_ggtt *ggtt = gt->ggtt;
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struct drm_mm_node target = {
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.start = 0,
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.size = 4096,
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};
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LIST_HEAD(objects);
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int err;
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/* Fill the GGTT with pinned objects and try to evict a range. */
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err = populate_ggtt(ggtt, &objects);
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if (err)
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goto cleanup;
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/* Everything is pinned, nothing should happen */
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mutex_lock(&ggtt->vm.mutex);
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err = i915_gem_evict_for_node(&ggtt->vm, NULL, &target, 0);
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mutex_unlock(&ggtt->vm.mutex);
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if (err != -ENOSPC) {
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pr_err("i915_gem_evict_for_node on a full GGTT returned err=%d\n",
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err);
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goto cleanup;
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}
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unpin_ggtt(ggtt);
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/* Everything is unpinned, we should be able to evict the node */
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mutex_lock(&ggtt->vm.mutex);
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err = i915_gem_evict_for_node(&ggtt->vm, NULL, &target, 0);
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mutex_unlock(&ggtt->vm.mutex);
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if (err) {
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pr_err("i915_gem_evict_for_node returned err=%d\n",
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err);
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goto cleanup;
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}
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cleanup:
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cleanup_objects(ggtt, &objects);
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return err;
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}
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static void mock_color_adjust(const struct drm_mm_node *node,
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unsigned long color,
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u64 *start,
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u64 *end)
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{
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}
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static int igt_evict_for_cache_color(void *arg)
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{
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struct intel_gt *gt = arg;
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struct i915_ggtt *ggtt = gt->ggtt;
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const unsigned long flags = PIN_OFFSET_FIXED;
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struct drm_mm_node target = {
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.start = I915_GTT_PAGE_SIZE * 2,
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.size = I915_GTT_PAGE_SIZE,
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.color = I915_CACHE_LLC,
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};
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struct drm_i915_gem_object *obj;
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struct i915_vma *vma;
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LIST_HEAD(objects);
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int err;
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/*
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* Currently the use of color_adjust for the GGTT is limited to cache
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* coloring and guard pages, and so the presence of mm.color_adjust for
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* the GGTT is assumed to be i915_ggtt_color_adjust, hence using a mock
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* color adjust will work just fine for our purposes.
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*/
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ggtt->vm.mm.color_adjust = mock_color_adjust;
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GEM_BUG_ON(!i915_vm_has_cache_coloring(&ggtt->vm));
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obj = i915_gem_object_create_internal(gt->i915, I915_GTT_PAGE_SIZE);
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if (IS_ERR(obj)) {
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err = PTR_ERR(obj);
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goto cleanup;
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}
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i915_gem_object_set_cache_coherency(obj, I915_CACHE_LLC);
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quirk_add(obj, &objects);
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vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0,
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I915_GTT_PAGE_SIZE | flags);
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if (IS_ERR(vma)) {
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pr_err("[0]i915_gem_object_ggtt_pin failed\n");
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err = PTR_ERR(vma);
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goto cleanup;
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}
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obj = i915_gem_object_create_internal(gt->i915, I915_GTT_PAGE_SIZE);
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if (IS_ERR(obj)) {
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err = PTR_ERR(obj);
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goto cleanup;
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}
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i915_gem_object_set_cache_coherency(obj, I915_CACHE_LLC);
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quirk_add(obj, &objects);
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/* Neighbouring; same colour - should fit */
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vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0,
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(I915_GTT_PAGE_SIZE * 2) | flags);
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if (IS_ERR(vma)) {
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pr_err("[1]i915_gem_object_ggtt_pin failed\n");
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err = PTR_ERR(vma);
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goto cleanup;
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}
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i915_vma_unpin(vma);
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/* Remove just the second vma */
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mutex_lock(&ggtt->vm.mutex);
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err = i915_gem_evict_for_node(&ggtt->vm, NULL, &target, 0);
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mutex_unlock(&ggtt->vm.mutex);
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if (err) {
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pr_err("[0]i915_gem_evict_for_node returned err=%d\n", err);
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goto cleanup;
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}
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/* Attempt to remove the first *pinned* vma, by removing the (empty)
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* neighbour -- this should fail.
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*/
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target.color = I915_CACHE_L3_LLC;
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mutex_lock(&ggtt->vm.mutex);
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err = i915_gem_evict_for_node(&ggtt->vm, NULL, &target, 0);
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mutex_unlock(&ggtt->vm.mutex);
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if (!err) {
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pr_err("[1]i915_gem_evict_for_node returned err=%d\n", err);
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err = -EINVAL;
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goto cleanup;
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}
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err = 0;
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cleanup:
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unpin_ggtt(ggtt);
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cleanup_objects(ggtt, &objects);
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ggtt->vm.mm.color_adjust = NULL;
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return err;
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}
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static int igt_evict_vm(void *arg)
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{
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struct intel_gt *gt = arg;
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struct i915_ggtt *ggtt = gt->ggtt;
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struct i915_gem_ww_ctx ww;
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LIST_HEAD(objects);
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int err;
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/* Fill the GGTT with pinned objects and try to evict everything. */
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err = populate_ggtt(ggtt, &objects);
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if (err)
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goto cleanup;
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/* Everything is pinned, nothing should happen */
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mutex_lock(&ggtt->vm.mutex);
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err = i915_gem_evict_vm(&ggtt->vm, NULL, NULL);
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mutex_unlock(&ggtt->vm.mutex);
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if (err) {
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pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n",
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err);
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goto cleanup;
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}
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unpin_ggtt(ggtt);
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for_i915_gem_ww(&ww, err, false) {
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mutex_lock(&ggtt->vm.mutex);
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err = i915_gem_evict_vm(&ggtt->vm, &ww, NULL);
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mutex_unlock(&ggtt->vm.mutex);
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}
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if (err) {
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pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n",
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err);
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goto cleanup;
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}
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cleanup:
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cleanup_objects(ggtt, &objects);
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|
|
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) {
|
||
|
|
pr_err("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));
|
||
|
|
}
|