drivers/gpu/drm/i915/gt/selftest_gt_pm.c

   1
   2 /*
   3  * SPDX-License-Identifier: MIT
   4  *
   5  * Copyright © 2019 Intel Corporation
   6  */
   7
   8 #include "selftest_llc.h"
   9
  10 static int live_gt_resume(void *arg)
  11 {
  12         struct intel_gt *gt = arg;
  13         IGT_TIMEOUT(end_time);
  14         int err;
  15
  16         /* Do several suspend/resume cycles to check we don't explode! */
  17         do {
  18                 intel_gt_suspend_prepare(gt);
  19                 intel_gt_suspend_late(gt);
  20
  21                 if (gt->rc6.enabled) {
  22                         pr_err("rc6 still enabled after suspend!\n");
  23                         intel_gt_set_wedged_on_init(gt);
  24                         err = -EINVAL;
  25                         break;
  26                 }
  27
  28                 err = intel_gt_resume(gt);
  29                 if (err)
  30                         break;
  31
  32                 if (gt->rc6.supported && !gt->rc6.enabled) {
  33                         pr_err("rc6 not enabled upon resume!\n");
  34                         intel_gt_set_wedged_on_init(gt);
  35                         err = -EINVAL;
  36                         break;
  37                 }
  38
  39                 err = st_llc_verify(&gt->llc);
  40                 if (err) {
  41                         pr_err("llc state not restored upon resume!\n");
  42                         intel_gt_set_wedged_on_init(gt);
  43                         break;
  44                 }
  45         } while (!__igt_timeout(end_time, NULL));
  46
  47         return err;
  48 }
  49
  50 int intel_gt_pm_live_selftests(struct drm_i915_private *i915)
  51 {
  52         static const struct i915_subtest tests[] = {
  53                 SUBTEST(live_gt_resume),
  54         };
  55
  56         if (intel_gt_is_wedged(&i915->gt))
  57                 return 0;
  58
  59         return intel_gt_live_subtests(tests, &i915->gt);
  60 }