1 /* 2 * SPDX-License-Identifier: MIT 3 * 4 * Copyright © 2016 Intel Corporation 5 */ 6 7 #include "i915_selftest.h" 8 9 #include "selftests/mock_gem_device.h" 10 11 static int mock_phys_object(void *arg) 12 { 13 struct drm_i915_private *i915 = arg; 14 struct drm_i915_gem_object *obj; 15 int err; 16 17 /* Create an object and bind it to a contiguous set of physical pages, 18 * i.e. exercise the i915_gem_object_phys API. 19 */ 20 21 obj = i915_gem_object_create_shmem(i915, PAGE_SIZE); 22 if (IS_ERR(obj)) { 23 err = PTR_ERR(obj); 24 pr_err("i915_gem_object_create failed, err=%d\n", err); 25 goto out; 26 } 27 28 i915_gem_object_lock(obj, NULL); 29 if (!i915_gem_object_has_struct_page(obj)) { 30 i915_gem_object_unlock(obj); 31 err = -EINVAL; 32 pr_err("shmem has no struct page\n"); 33 goto out_obj; 34 } 35 36 err = i915_gem_object_attach_phys(obj, PAGE_SIZE); 37 i915_gem_object_unlock(obj); 38 if (err) { 39 pr_err("i915_gem_object_attach_phys failed, err=%d\n", err); 40 goto out_obj; 41 } 42 43 if (i915_gem_object_has_struct_page(obj)) { 44 pr_err("i915_gem_object_attach_phys did not create a phys object\n"); 45 err = -EINVAL; 46 goto out_obj; 47 } 48 49 if (!atomic_read(&obj->mm.pages_pin_count)) { 50 pr_err("i915_gem_object_attach_phys did not pin its phys pages\n"); 51 err = -EINVAL; 52 goto out_obj; 53 } 54 55 /* Make the object dirty so that put_pages must do copy back the data */ 56 i915_gem_object_lock(obj, NULL); 57 err = i915_gem_object_set_to_gtt_domain(obj, true); 58 i915_gem_object_unlock(obj); 59 if (err) { 60 pr_err("i915_gem_object_set_to_gtt_domain failed with err=%d\n", 61 err); 62 goto out_obj; 63 } 64 65 out_obj: 66 i915_gem_object_put(obj); 67 out: 68 return err; 69 } 70 71 int i915_gem_phys_mock_selftests(void) 72 { 73 static const struct i915_subtest tests[] = { 74 SUBTEST(mock_phys_object), 75 }; 76 struct drm_i915_private *i915; 77 int err; 78 79 i915 = mock_gem_device(); 80 if (!i915) 81 return -ENOMEM; 82 83 err = i915_subtests(tests, i915); 84 85 mock_destroy_device(i915); 86 return err; 87 } 88