Quelle  igt_flush_test.c   Sprache: C

/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright © 2018 Intel Corporation
 */

#include "gt/intel_gt.h"
#include "gt/intel_gt_requests.h"

#include "i915_drv.h"
#include "i915_selftest.h"

#include "igt_flush_test.h"

int igt_flush_test(struct drm_i915_private *i915)
{
 struct intel_gt *gt;
 unsigned int i;
 int ret = 0;

 for_each_gt(gt, i915, i) {
  struct intel_engine_cs *engine;
  unsigned long timeout_ms = 0;
  unsigned int id;

  if (intel_gt_is_wedged(gt))
   ret = -EIO;

  for_each_engine(engine, gt, id) {
   if (engine->props.preempt_timeout_ms > timeout_ms)
    timeout_ms = engine->props.preempt_timeout_ms;
  }

  cond_resched();

  /* 2x longest preempt timeout, experimentally determined */
  if (intel_gt_wait_for_idle(gt, HZ * timeout_ms / 500) == -ETIME) {
   pr_err("%pS timed out, cancelling all further testing.\n",
          __builtin_return_address(0));

   GEM_TRACE("%pS timed out.\n",
      __builtin_return_address(0));
   GEM_TRACE_DUMP();

   intel_gt_set_wedged(gt);
   ret = -EIO;
  }
 }

 return ret;
}