/* * 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_pm.h" #include "gem/selftests/igt_gem_utils.h" #include "gem/selftests/mock_context.h" #include "gt/intel_gt.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(obj->mm.quirked); obj->mm.quirked = true; list_add(&obj->st_link, objects); } static int populate_ggtt(struct i915_ggtt *ggtt, struct list_head *objects) { unsigned long unbound, bound, count; struct drm_i915_gem_object *obj; 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); bound = 0; unbound = 0; list_for_each_entry(obj, objects, st_link) { GEM_BUG_ON(!obj->mm.quirked); if (atomic_read(&obj->bind_count)) bound++; else unbound++; } GEM_BUG_ON(bound + unbound != count); if (unbound) { pr_err("%s: Found %lu objects unbound, expected %u!\n", __func__, unbound, 0); return -EINVAL; } if (bound != count) { pr_err("%s: Found %lu objects bound, expected %lu!\n", __func__, bound, count); return -EINVAL; } 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 (vma->obj->mm.quirked) 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(!obj->mm.quirked); obj->mm.quirked = false; 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, 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, 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, &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, &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_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, &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_CACHE_L3_LLC; mutex_lock(&ggtt->vm.mutex); err = i915_gem_evict_for_node(&ggtt->vm, &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; 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); 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); mutex_lock(&ggtt->vm.mutex); err = i915_gem_evict_vm(&ggtt->vm); 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, &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, &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 file *file; file = mock_file(i915); if (IS_ERR(file)) { err = PTR_ERR(file); break; } count = 0; onstack_fence_init(&fence); do { struct i915_request *rq; struct i915_gem_context *ctx; ctx = live_context(i915, file); if (IS_ERR(ctx)) break; /* We will need some GGTT space for the rq's context */ igt_evict_ctl.fail_if_busy = true; rq = igt_request_alloc(ctx, engine); igt_evict_ctl.fail_if_busy = false; 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++; err = 0; } while(1); onstack_fence_fini(&fence); pr_info("Submitted %lu contexts/requests on %s\n", count, engine->name); fput(file); if (err) 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, &i915->gt); drm_dev_put(&i915->drm); 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(&i915->gt)) return 0; return intel_gt_live_subtests(tests, &i915->gt); }