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
igt_global_reset_lock(struct intel_gt * gt)14 void 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, >->reset.flags))
22 wait_event(gt->reset.queue,
23 !test_bit(I915_RESET_BACKOFF, >->reset.flags));
24
25 for_each_engine(engine, gt, id) {
26 while (test_and_set_bit(I915_RESET_ENGINE + id,
27 >->reset.flags))
28 wait_on_bit(>->reset.flags, I915_RESET_ENGINE + id,
29 TASK_UNINTERRUPTIBLE);
30 }
31 }
32
igt_global_reset_unlock(struct intel_gt * gt)33 void 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, >->reset.flags);
40
41 clear_bit(I915_RESET_BACKOFF, >->reset.flags);
42 wake_up_all(>->reset.queue);
43 }
44
igt_force_reset(struct intel_gt * gt)45 bool 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