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 mutex_lock(&i915->drm.struct_mutex); 29 err = i915_gem_object_attach_phys(obj, PAGE_SIZE); 30 mutex_unlock(&i915->drm.struct_mutex); 31 if (err) { 32 pr_err("i915_gem_object_attach_phys failed, err=%d\n", err); 33 goto out_obj; 34 } 35 36 if (obj->ops != &i915_gem_phys_ops) { 37 pr_err("i915_gem_object_attach_phys did not create a phys object\n"); 38 err = -EINVAL; 39 goto out_obj; 40 } 41 42 if (!atomic_read(&obj->mm.pages_pin_count)) { 43 pr_err("i915_gem_object_attach_phys did not pin its phys pages\n"); 44 err = -EINVAL; 45 goto out_obj; 46 } 47 48 /* Make the object dirty so that put_pages must do copy back the data */ 49 i915_gem_object_lock(obj); 50 err = i915_gem_object_set_to_gtt_domain(obj, true); 51 i915_gem_object_unlock(obj); 52 if (err) { 53 pr_err("i915_gem_object_set_to_gtt_domain failed with err=%d\n", 54 err); 55 goto out_obj; 56 } 57 58 out_obj: 59 i915_gem_object_put(obj); 60 out: 61 return err; 62 } 63 64 int i915_gem_phys_mock_selftests(void) 65 { 66 static const struct i915_subtest tests[] = { 67 SUBTEST(mock_phys_object), 68 }; 69 struct drm_i915_private *i915; 70 int err; 71 72 i915 = mock_gem_device(); 73 if (!i915) 74 return -ENOMEM; 75 76 err = i915_subtests(tests, i915); 77 78 drm_dev_put(&i915->drm); 79 return err; 80 } 81