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1/*2 * SPDX-License-Identifier: MIT3 *4 * Copyright © 2016 Intel Corporation5 */6 7#include "i915_selftest.h"8 9#include "selftests/mock_gem_device.h"10 11static 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 65out_obj:66 i915_gem_object_put(obj);67out:68 return err;69}70 71int 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