LXR linux/drivers/gpu/drm/i915/selftests/igt

   1/*
   2 * SPDX-License-Identifier: MIT
   3 *
   4 * Copyright © 2018 Intel Corporation
   5 */
   6
   7#include "igt_reset.h"
   8
   9#include "gt/intel_engine.h"
  10#include "gt/intel_gt.h"
  11
  12#include "../i915_drv.h"
  13
  14void igt_global_reset_lock(struct intel_gt *gt)
  15{
  16        struct intel_engine_cs *engine;
  17        enum intel_engine_id id;
  18
  19        pr_debug("%s: current gpu_error=%08lx\n", __func__, gt->reset.flags);
  20
  21        while (test_and_set_bit(I915_RESET_BACKOFF, &gt->reset.flags))
  22                wait_event(gt->reset.queue,
  23                           !test_bit(I915_RESET_BACKOFF, &gt->reset.flags));
  24
  25        for_each_engine(engine, gt, id) {
  26                while (test_and_set_bit(I915_RESET_ENGINE + id,
  27                                        &gt->reset.flags))
  28                        wait_on_bit(&gt->reset.flags, I915_RESET_ENGINE + id,
  29                                    TASK_UNINTERRUPTIBLE);
  30        }
  31}
  32
  33void igt_global_reset_unlock(struct intel_gt *gt)
  34{
  35        struct intel_engine_cs *engine;
  36        enum intel_engine_id id;
  37
  38        for_each_engine(engine, gt, id)
  39                clear_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
  40
  41        clear_bit(I915_RESET_BACKOFF, &gt->reset.flags);
  42        wake_up_all(&gt->reset.queue);
  43}
  44
  45bool igt_force_reset(struct intel_gt *gt)
  46{
  47        intel_gt_set_wedged(gt);
  48        intel_gt_reset(gt, 0, NULL);
  49
  50        return !intel_gt_is_wedged(gt);
  51}
  52