1 /*
2  * SPDX-License-Identifier: MIT
3  *
4  * Copyright © 2008-2018 Intel Corporation
5  */
6 
7 #ifndef I915_RESET_H
8 #define I915_RESET_H
9 
10 #include <linux/compiler.h>
11 #include <linux/types.h>
12 #include <linux/srcu.h>
13 
14 #include "intel_engine_types.h"
15 #include "intel_reset_types.h"
16 
17 struct i915_request;
18 struct intel_engine_cs;
19 struct intel_gt;
20 struct intel_guc;
21 
22 void intel_gt_init_reset(struct intel_gt *gt);
23 void intel_gt_fini_reset(struct intel_gt *gt);
24 
25 __printf(4, 5)
26 void intel_gt_handle_error(struct intel_gt *gt,
27 			   intel_engine_mask_t engine_mask,
28 			   unsigned long flags,
29 			   const char *fmt, ...);
30 #define I915_ERROR_CAPTURE BIT(0)
31 
32 void intel_gt_reset(struct intel_gt *gt,
33 		    intel_engine_mask_t stalled_mask,
34 		    const char *reason);
35 int intel_engine_reset(struct intel_engine_cs *engine,
36 		       const char *reason);
37 
38 void __i915_request_reset(struct i915_request *rq, bool guilty);
39 
40 int __must_check intel_gt_reset_trylock(struct intel_gt *gt, int *srcu);
41 void intel_gt_reset_unlock(struct intel_gt *gt, int tag);
42 
43 void intel_gt_set_wedged(struct intel_gt *gt);
44 bool intel_gt_unset_wedged(struct intel_gt *gt);
45 int intel_gt_terminally_wedged(struct intel_gt *gt);
46 
47 /*
48  * There's no unset_wedged_on_init paired with this one.
49  * Once we're wedged on init, there's no going back.
50  * Same thing for unset_wedged_on_fini.
51  */
52 void intel_gt_set_wedged_on_init(struct intel_gt *gt);
53 void intel_gt_set_wedged_on_fini(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 bool intel_has_gpu_reset(const struct intel_gt *gt);
77 bool intel_has_reset_engine(const struct intel_gt *gt);
78 
79 #endif /* I915_RESET_H */
80