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 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 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 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