drivers/gpu/drm/i915/selftests/igt_reset.c

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright © 2018 Intel Corporation
   5  */
   6
   7 #include "igt_reset.h"
   8
   9 #include "../i915_drv.h"
  10 #include "../intel_ringbuffer.h"
  11
  12 void igt_global_reset_lock(struct drm_i915_private *i915)
  13 {
  14         struct intel_engine_cs *engine;
  15         enum intel_engine_id id;
  16
  17         pr_debug("%s: current gpu_error=%08lx\n",
  18                  __func__, i915->gpu_error.flags);
  19
  20         while (test_and_set_bit(I915_RESET_BACKOFF, &i915->gpu_error.flags))
  21                 wait_event(i915->gpu_error.reset_queue,
  22                            !test_bit(I915_RESET_BACKOFF,
  23                                      &i915->gpu_error.flags));
  24
  25         for_each_engine(engine, i915, id) {
  26                 while (test_and_set_bit(I915_RESET_ENGINE + id,
  27                                         &i915->gpu_error.flags))
  28                         wait_on_bit(&i915->gpu_error.flags,
  29                                     I915_RESET_ENGINE + id,
  30                                     TASK_UNINTERRUPTIBLE);
  31         }
  32 }
  33
  34 void igt_global_reset_unlock(struct drm_i915_private *i915)
  35 {
  36         struct intel_engine_cs *engine;
  37         enum intel_engine_id id;
  38
  39         for_each_engine(engine, i915, id)
  40                 clear_bit(I915_RESET_ENGINE + id, &i915->gpu_error.flags);
  41
  42         clear_bit(I915_RESET_BACKOFF, &i915->gpu_error.flags);
  43         wake_up_all(&i915->gpu_error.reset_queue);
  44 }