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 err = i915_gem_object_attach_phys(obj, PAGE_SIZE); 29 if (err) { 30 pr_err("i915_gem_object_attach_phys failed, err=%d\n", err); 31 goto out_obj; 32 } 33 34 if (obj->ops != &i915_gem_phys_ops) { 35 pr_err("i915_gem_object_attach_phys did not create a phys object\n"); 36 err = -EINVAL; 37 goto out_obj; 38 } 39 40 if (!atomic_read(&obj->mm.pages_pin_count)) { 41 pr_err("i915_gem_object_attach_phys did not pin its phys pages\n"); 42 err = -EINVAL; 43 goto out_obj; 44 } 45 46 /* Make the object dirty so that put_pages must do copy back the data */ 47 i915_gem_object_lock(obj); 48 err = i915_gem_object_set_to_gtt_domain(obj, true); 49 i915_gem_object_unlock(obj); 50 if (err) { 51 pr_err("i915_gem_object_set_to_gtt_domain failed with err=%d\n", 52 err); 53 goto out_obj; 54 } 55 56 out_obj: 57 i915_gem_object_put(obj); 58 out: 59 return err; 60 } 61 62 int i915_gem_phys_mock_selftests(void) 63 { 64 static const struct i915_subtest tests[] = { 65 SUBTEST(mock_phys_object), 66 }; 67 struct drm_i915_private *i915; 68 int err; 69 70 i915 = mock_gem_device(); 71 if (!i915) 72 return -ENOMEM; 73 74 err = i915_subtests(tests, i915); 75 76 drm_dev_put(&i915->drm); 77 return err; 78 } 79