diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gem/selftests/i915_gem_phys.c')
-rw-r--r-- | drivers/gpu/drm/i915/gem/selftests/i915_gem_phys.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_phys.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_phys.c new file mode 100644 index 0000000000..d43d8dae0f --- /dev/null +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_phys.c @@ -0,0 +1,87 @@ +/* + * SPDX-License-Identifier: MIT + * + * Copyright © 2016 Intel Corporation + */ + +#include "i915_selftest.h" + +#include "selftests/mock_gem_device.h" + +static int mock_phys_object(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct drm_i915_gem_object *obj; + int err; + + /* Create an object and bind it to a contiguous set of physical pages, + * i.e. exercise the i915_gem_object_phys API. + */ + + obj = i915_gem_object_create_shmem(i915, PAGE_SIZE); + if (IS_ERR(obj)) { + err = PTR_ERR(obj); + pr_err("i915_gem_object_create failed, err=%d\n", err); + goto out; + } + + i915_gem_object_lock(obj, NULL); + if (!i915_gem_object_has_struct_page(obj)) { + i915_gem_object_unlock(obj); + err = -EINVAL; + pr_err("shmem has no struct page\n"); + goto out_obj; + } + + err = i915_gem_object_attach_phys(obj, PAGE_SIZE); + i915_gem_object_unlock(obj); + if (err) { + pr_err("i915_gem_object_attach_phys failed, err=%d\n", err); + goto out_obj; + } + + if (i915_gem_object_has_struct_page(obj)) { + pr_err("i915_gem_object_attach_phys did not create a phys object\n"); + err = -EINVAL; + goto out_obj; + } + + if (!atomic_read(&obj->mm.pages_pin_count)) { + pr_err("i915_gem_object_attach_phys did not pin its phys pages\n"); + err = -EINVAL; + goto out_obj; + } + + /* Make the object dirty so that put_pages must do copy back the data */ + i915_gem_object_lock(obj, NULL); + err = i915_gem_object_set_to_gtt_domain(obj, true); + i915_gem_object_unlock(obj); + if (err) { + pr_err("i915_gem_object_set_to_gtt_domain failed with err=%d\n", + err); + goto out_obj; + } + +out_obj: + i915_gem_object_put(obj); +out: + return err; +} + +int i915_gem_phys_mock_selftests(void) +{ + static const struct i915_subtest tests[] = { + SUBTEST(mock_phys_object), + }; + struct drm_i915_private *i915; + int err; + + i915 = mock_gem_device(); + if (!i915) + return -ENOMEM; + + err = i915_subtests(tests, i915); + + mock_destroy_device(i915); + return err; +} |