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 if (!i915_gem_object_has_struct_page(obj)) { 29 err = -EINVAL; 30 pr_err("shmem has no struct page\n"); 31 goto out_obj; 32 } 33 34 i915_gem_object_lock(obj, NULL); 35 err = i915_gem_object_attach_phys(obj, PAGE_SIZE); 36 i915_gem_object_unlock(obj); 37 if (err) { 38 pr_err("i915_gem_object_attach_phys failed, err=%d\n", err); 39 goto out_obj; 40 } 41 42 if (i915_gem_object_has_struct_page(obj)) { 43 pr_err("i915_gem_object_attach_phys did not create a phys object\n"); 44 err = -EINVAL; 45 goto out_obj; 46 } 47 48 if (!atomic_read(&obj->mm.pages_pin_count)) { 49 pr_err("i915_gem_object_attach_phys did not pin its phys pages\n"); 50 err = -EINVAL; 51 goto out_obj; 52 } 53 54 /* Make the object dirty so that put_pages must do copy back the data */ 55 i915_gem_object_lock(obj, NULL); 56 err = i915_gem_object_set_to_gtt_domain(obj, true); 57 i915_gem_object_unlock(obj); 58 if (err) { 59 pr_err("i915_gem_object_set_to_gtt_domain failed with err=%d\n", 60 err); 61 goto out_obj; 62 } 63 64 out_obj: 65 i915_gem_object_put(obj); 66 out: 67 return err; 68 } 69 70 int i915_gem_phys_mock_selftests(void) 71 { 72 static const struct i915_subtest tests[] = { 73 SUBTEST(mock_phys_object), 74 }; 75 struct drm_i915_private *i915; 76 int err; 77 78 i915 = mock_gem_device(); 79 if (!i915) 80 return -ENOMEM; 81 82 err = i915_subtests(tests, i915); 83 84 mock_destroy_device(i915); 85 return err; 86 } 87