| /* |
| * SPDX-License-Identifier: MIT |
| * |
| * Copyright © 2018 Intel Corporation |
| */ |
| |
| #include <linux/random.h> |
| |
| #include "../i915_selftest.h" |
| |
| #include "mock_context.h" |
| #include "igt_flush_test.h" |
| |
| static int switch_to_context(struct drm_i915_private *i915, |
| struct i915_gem_context *ctx) |
| { |
| struct intel_engine_cs *engine; |
| enum intel_engine_id id; |
| intel_wakeref_t wakeref; |
| int err = 0; |
| |
| wakeref = intel_runtime_pm_get(i915); |
| |
| for_each_engine(engine, i915, id) { |
| struct i915_request *rq; |
| |
| rq = i915_request_alloc(engine, ctx); |
| if (IS_ERR(rq)) { |
| err = PTR_ERR(rq); |
| break; |
| } |
| |
| i915_request_add(rq); |
| } |
| |
| intel_runtime_pm_put(i915, wakeref); |
| |
| return err; |
| } |
| |
| static void trash_stolen(struct drm_i915_private *i915) |
| { |
| struct i915_ggtt *ggtt = &i915->ggtt; |
| const u64 slot = ggtt->error_capture.start; |
| const resource_size_t size = resource_size(&i915->dsm); |
| unsigned long page; |
| u32 prng = 0x12345678; |
| |
| for (page = 0; page < size; page += PAGE_SIZE) { |
| const dma_addr_t dma = i915->dsm.start + page; |
| u32 __iomem *s; |
| int x; |
| |
| ggtt->vm.insert_page(&ggtt->vm, dma, slot, I915_CACHE_NONE, 0); |
| |
| s = io_mapping_map_atomic_wc(&ggtt->iomap, slot); |
| for (x = 0; x < PAGE_SIZE / sizeof(u32); x++) { |
| prng = next_pseudo_random32(prng); |
| iowrite32(prng, &s[x]); |
| } |
| io_mapping_unmap_atomic(s); |
| } |
| |
| ggtt->vm.clear_range(&ggtt->vm, slot, PAGE_SIZE); |
| } |
| |
| static void simulate_hibernate(struct drm_i915_private *i915) |
| { |
| intel_wakeref_t wakeref; |
| |
| wakeref = intel_runtime_pm_get(i915); |
| |
| /* |
| * As a final sting in the tail, invalidate stolen. Under a real S4, |
| * stolen is lost and needs to be refilled on resume. However, under |
| * CI we merely do S4-device testing (as full S4 is too unreliable |
| * for automated testing across a cluster), so to simulate the effect |
| * of stolen being trashed across S4, we trash it ourselves. |
| */ |
| trash_stolen(i915); |
| |
| intel_runtime_pm_put(i915, wakeref); |
| } |
| |
| static int pm_prepare(struct drm_i915_private *i915) |
| { |
| int err = 0; |
| |
| if (i915_gem_suspend(i915)) { |
| pr_err("i915_gem_suspend failed\n"); |
| err = -EINVAL; |
| } |
| |
| return err; |
| } |
| |
| static void pm_suspend(struct drm_i915_private *i915) |
| { |
| intel_wakeref_t wakeref; |
| |
| with_intel_runtime_pm(i915, wakeref) { |
| i915_gem_suspend_gtt_mappings(i915); |
| i915_gem_suspend_late(i915); |
| } |
| } |
| |
| static void pm_hibernate(struct drm_i915_private *i915) |
| { |
| intel_wakeref_t wakeref; |
| |
| with_intel_runtime_pm(i915, wakeref) { |
| i915_gem_suspend_gtt_mappings(i915); |
| |
| i915_gem_freeze(i915); |
| i915_gem_freeze_late(i915); |
| } |
| } |
| |
| static void pm_resume(struct drm_i915_private *i915) |
| { |
| intel_wakeref_t wakeref; |
| |
| /* |
| * Both suspend and hibernate follow the same wakeup path and assume |
| * that runtime-pm just works. |
| */ |
| with_intel_runtime_pm(i915, wakeref) { |
| intel_engines_sanitize(i915, false); |
| i915_gem_sanitize(i915); |
| i915_gem_resume(i915); |
| } |
| } |
| |
| static int igt_gem_suspend(void *arg) |
| { |
| struct drm_i915_private *i915 = arg; |
| struct i915_gem_context *ctx; |
| struct drm_file *file; |
| int err; |
| |
| file = mock_file(i915); |
| if (IS_ERR(file)) |
| return PTR_ERR(file); |
| |
| err = -ENOMEM; |
| mutex_lock(&i915->drm.struct_mutex); |
| ctx = live_context(i915, file); |
| if (!IS_ERR(ctx)) |
| err = switch_to_context(i915, ctx); |
| mutex_unlock(&i915->drm.struct_mutex); |
| if (err) |
| goto out; |
| |
| err = pm_prepare(i915); |
| if (err) |
| goto out; |
| |
| pm_suspend(i915); |
| |
| /* Here be dragons! Note that with S3RST any S3 may become S4! */ |
| simulate_hibernate(i915); |
| |
| pm_resume(i915); |
| |
| mutex_lock(&i915->drm.struct_mutex); |
| err = switch_to_context(i915, ctx); |
| if (igt_flush_test(i915, I915_WAIT_LOCKED)) |
| err = -EIO; |
| mutex_unlock(&i915->drm.struct_mutex); |
| out: |
| mock_file_free(i915, file); |
| return err; |
| } |
| |
| static int igt_gem_hibernate(void *arg) |
| { |
| struct drm_i915_private *i915 = arg; |
| struct i915_gem_context *ctx; |
| struct drm_file *file; |
| int err; |
| |
| file = mock_file(i915); |
| if (IS_ERR(file)) |
| return PTR_ERR(file); |
| |
| err = -ENOMEM; |
| mutex_lock(&i915->drm.struct_mutex); |
| ctx = live_context(i915, file); |
| if (!IS_ERR(ctx)) |
| err = switch_to_context(i915, ctx); |
| mutex_unlock(&i915->drm.struct_mutex); |
| if (err) |
| goto out; |
| |
| err = pm_prepare(i915); |
| if (err) |
| goto out; |
| |
| pm_hibernate(i915); |
| |
| /* Here be dragons! */ |
| simulate_hibernate(i915); |
| |
| pm_resume(i915); |
| |
| mutex_lock(&i915->drm.struct_mutex); |
| err = switch_to_context(i915, ctx); |
| if (igt_flush_test(i915, I915_WAIT_LOCKED)) |
| err = -EIO; |
| mutex_unlock(&i915->drm.struct_mutex); |
| out: |
| mock_file_free(i915, file); |
| return err; |
| } |
| |
| int i915_gem_live_selftests(struct drm_i915_private *i915) |
| { |
| static const struct i915_subtest tests[] = { |
| SUBTEST(igt_gem_suspend), |
| SUBTEST(igt_gem_hibernate), |
| }; |
| |
| return i915_subtests(tests, i915); |
| } |