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      1 /*	$NetBSD: intel_reset.h,v 1.2 2021/12/18 23:45:30 riastradh Exp $	*/
      2 
      3 /*
      4  * SPDX-License-Identifier: MIT
      5  *
      6  * Copyright  2008-2018 Intel Corporation
      7  */
      8 
      9 #ifndef I915_RESET_H
     10 #define I915_RESET_H
     11 
     12 #include <linux/compiler.h>
     13 #include <linux/types.h>
     14 #include <linux/srcu.h>
     15 
     16 #include "intel_engine_types.h"
     17 #include "intel_reset_types.h"
     18 
     19 struct i915_request;
     20 struct intel_engine_cs;
     21 struct intel_gt;
     22 struct intel_guc;
     23 
     24 void intel_gt_init_reset(struct intel_gt *gt);
     25 void intel_gt_fini_reset(struct intel_gt *gt);
     26 
     27 __printf(4, 5)
     28 void intel_gt_handle_error(struct intel_gt *gt,
     29 			   intel_engine_mask_t engine_mask,
     30 			   unsigned long flags,
     31 			   const char *fmt, ...);
     32 #define I915_ERROR_CAPTURE BIT(0)
     33 
     34 void intel_gt_reset(struct intel_gt *gt,
     35 		    intel_engine_mask_t stalled_mask,
     36 		    const char *reason);
     37 int intel_engine_reset(struct intel_engine_cs *engine,
     38 		       const char *reason);
     39 
     40 void __i915_request_reset(struct i915_request *rq, bool guilty);
     41 
     42 int __must_check intel_gt_reset_trylock(struct intel_gt *gt, int *srcu);
     43 void intel_gt_reset_unlock(struct intel_gt *gt, int tag);
     44 
     45 void intel_gt_set_wedged(struct intel_gt *gt);
     46 bool intel_gt_unset_wedged(struct intel_gt *gt);
     47 int intel_gt_terminally_wedged(struct intel_gt *gt);
     48 
     49 /*
     50  * There's no unset_wedged_on_init paired with this one.
     51  * Once we're wedged on init, there's no going back.
     52  */
     53 void intel_gt_set_wedged_on_init(struct intel_gt *gt);
     54 
     55 int __intel_gt_reset(struct intel_gt *gt, intel_engine_mask_t engine_mask);
     56 
     57 int intel_reset_guc(struct intel_gt *gt);
     58 
     59 struct intel_wedge_me {
     60 	struct delayed_work work;
     61 	struct intel_gt *gt;
     62 	const char *name;
     63 };
     64 
     65 void __intel_init_wedge(struct intel_wedge_me *w,
     66 			struct intel_gt *gt,
     67 			long timeout,
     68 			const char *name);
     69 void __intel_fini_wedge(struct intel_wedge_me *w);
     70 
     71 #define intel_wedge_on_timeout(W, GT, TIMEOUT)				\
     72 	for (__intel_init_wedge((W), (GT), (TIMEOUT), __func__);	\
     73 	     (W)->gt;							\
     74 	     __intel_fini_wedge((W)))
     75 
     76 static inline bool __intel_reset_failed(const struct intel_reset *reset)
     77 {
     78 	GEM_BUG_ON(test_bit(I915_WEDGED_ON_INIT, &reset->flags) ?
     79 		   !test_bit(I915_WEDGED, &reset->flags) : false);
     80 
     81 	return unlikely(test_bit(I915_WEDGED, &reset->flags));
     82 }
     83 
     84 bool intel_has_gpu_reset(const struct intel_gt *gt);
     85 bool intel_has_reset_engine(const struct intel_gt *gt);
     86 
     87 #endif /* I915_RESET_H */
     88