brintos / linux-shallow public Read only

1/*2 * SPDX-License-Identifier: MIT3 *4 * Copyright © 2018 Intel Corporation5 */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_and_wake_up_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