diff options
Diffstat (limited to 'drivers/gpu/drm/i915/selftests/i915_gem.c')
| -rw-r--r-- | drivers/gpu/drm/i915/selftests/i915_gem.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem.c b/drivers/gpu/drm/i915/selftests/i915_gem.c new file mode 100644 index 000000000000..d0aa19d17653 --- /dev/null +++ b/drivers/gpu/drm/i915/selftests/i915_gem.c @@ -0,0 +1,221 @@ +/* + * 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; + int err = 0; + + 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); + + 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_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); +} + +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_runtime_pm_get(i915); + + i915_gem_suspend_gtt_mappings(i915); + i915_gem_suspend_late(i915); + + intel_runtime_pm_put(i915); +} + +static void pm_hibernate(struct drm_i915_private *i915) +{ + intel_runtime_pm_get(i915); + + i915_gem_suspend_gtt_mappings(i915); + + i915_gem_freeze(i915); + i915_gem_freeze_late(i915); + + intel_runtime_pm_put(i915); +} + +static void pm_resume(struct drm_i915_private *i915) +{ + /* + * Both suspend and hibernate follow the same wakeup path and assume + * that runtime-pm just works. + */ + intel_runtime_pm_get(i915); + + intel_engines_sanitize(i915); + i915_gem_sanitize(i915); + i915_gem_resume(i915); + + intel_runtime_pm_put(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); +} |