| /* |
| * 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 "lib_sw_fence.h" |
| #include "mock_context.h" |
| #include "mock_drm.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.vm.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, mm.link) |
| size++; |
| |
| pr_err("Found %lld objects unbound!\n", size); |
| return -EINVAL; |
| } |
| |
| if (list_empty(&i915->ggtt.vm.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.vm.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, mm.link) |
| i915_gem_object_put(obj); |
| |
| list_for_each_entry_safe(obj, on, &i915->mm.bound_list, mm.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->vm, |
| 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->vm, |
| 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; |
| } |
| |
| 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->vm, &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->vm, &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->vm.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->vm, &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->vm, &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->vm.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->vm); |
| 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->vm); |
| 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; |
| } |
| |
| static int igt_evict_contexts(void *arg) |
| { |
| const u64 PRETEND_GGTT_SIZE = 16ull << 20; |
| struct drm_i915_private *i915 = arg; |
| struct intel_engine_cs *engine; |
| enum intel_engine_id id; |
| struct reserved { |
| struct drm_mm_node node; |
| struct reserved *next; |
| } *reserved = NULL; |
| 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; |
| |
| mutex_lock(&i915->drm.struct_mutex); |
| intel_runtime_pm_get(i915); |
| |
| /* Reserve a block so that we know we have enough to fit a few rq */ |
| memset(&hole, 0, sizeof(hole)); |
| err = i915_gem_gtt_insert(&i915->ggtt.vm, &hole, |
| PRETEND_GGTT_SIZE, 0, I915_COLOR_UNEVICTABLE, |
| 0, i915->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; |
| |
| r = kcalloc(1, sizeof(*r), GFP_KERNEL); |
| if (!r) { |
| err = -ENOMEM; |
| goto out_locked; |
| } |
| |
| if (i915_gem_gtt_insert(&i915->ggtt.vm, &r->node, |
| 1ul << 20, 0, I915_COLOR_UNEVICTABLE, |
| 0, i915->ggtt.vm.total, |
| PIN_NOEVICT)) { |
| kfree(r); |
| break; |
| } |
| |
| r->next = reserved; |
| reserved = r; |
| |
| count++; |
| } while (1); |
| drm_mm_remove_node(&hole); |
| mutex_unlock(&i915->drm.struct_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, i915, id) { |
| struct i915_sw_fence fence; |
| struct drm_file *file; |
| |
| file = mock_file(i915); |
| if (IS_ERR(file)) |
| return PTR_ERR(file); |
| |
| count = 0; |
| mutex_lock(&i915->drm.struct_mutex); |
| onstack_fence_init(&fence); |
| do { |
| struct i915_request *rq; |
| struct i915_gem_context *ctx; |
| |
| ctx = live_context(i915, file); |
| if (!ctx) |
| break; |
| |
| /* We will need some GGTT space for the rq's context */ |
| igt_evict_ctl.fail_if_busy = true; |
| rq = i915_request_alloc(engine, ctx); |
| 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 (ctx hw id %u, on %s): %d\n", |
| ctx->hw_id, 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); |
| mutex_unlock(&i915->drm.struct_mutex); |
| |
| onstack_fence_fini(&fence); |
| pr_info("Submitted %lu contexts/requests on %s\n", |
| count, engine->name); |
| |
| mock_file_free(i915, file); |
| if (err) |
| break; |
| } |
| |
| mutex_lock(&i915->drm.struct_mutex); |
| out_locked: |
| 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); |
| intel_runtime_pm_put(i915); |
| mutex_unlock(&i915->drm.struct_mutex); |
| |
| 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_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 (i915_terminally_wedged(&i915->gpu_error)) |
| return 0; |
| |
| return i915_subtests(tests, i915); |
| } |