LXR linux/drivers/gpu/drm/i915/gem/selftests/i915_gem

   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
  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        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
  56out_obj:
  57        i915_gem_object_put(obj);
  58out:
  59        return err;
  60}
  61
  62int 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