1 /* SPDX-License-Identifier: MIT */
2 /*
3  * Copyright © 2014-2019 Intel Corporation
4  */
5 
6 #ifndef _INTEL_GUC_LOG_H_
7 #define _INTEL_GUC_LOG_H_
8 
9 #include <linux/mutex.h>
10 #include <linux/relay.h>
11 #include <linux/workqueue.h>
12 
13 #include "intel_guc_fwif.h"
14 #include "i915_gem.h"
15 
16 struct intel_guc;
17 
18 #ifdef CONFIG_DRM_I915_DEBUG_GUC
19 #define CRASH_BUFFER_SIZE	SZ_2M
20 #define DPC_BUFFER_SIZE		SZ_8M
21 #define ISR_BUFFER_SIZE		SZ_8M
22 #else
23 #define CRASH_BUFFER_SIZE	SZ_8K
24 #define DPC_BUFFER_SIZE		SZ_32K
25 #define ISR_BUFFER_SIZE		SZ_32K
26 #endif
27 
28 /*
29  * While we're using plain log level in i915, GuC controls are much more...
30  * "elaborate"? We have a couple of bits for verbosity, separate bit for actual
31  * log enabling, and separate bit for default logging - which "conveniently"
32  * ignores the enable bit.
33  */
34 #define GUC_LOG_LEVEL_DISABLED		0
35 #define GUC_LOG_LEVEL_NON_VERBOSE	1
36 #define GUC_LOG_LEVEL_IS_ENABLED(x)	((x) > GUC_LOG_LEVEL_DISABLED)
37 #define GUC_LOG_LEVEL_IS_VERBOSE(x)	((x) > GUC_LOG_LEVEL_NON_VERBOSE)
38 #define GUC_LOG_LEVEL_TO_VERBOSITY(x) ({		\
39 	typeof(x) _x = (x);				\
40 	GUC_LOG_LEVEL_IS_VERBOSE(_x) ? _x - 2 : 0;	\
41 })
42 #define GUC_VERBOSITY_TO_LOG_LEVEL(x)	((x) + 2)
43 #define GUC_LOG_LEVEL_MAX GUC_VERBOSITY_TO_LOG_LEVEL(GUC_LOG_VERBOSITY_MAX)
44 
45 struct intel_guc_log {
46 	u32 level;
47 	struct i915_vma *vma;
48 	struct {
49 		void *buf_addr;
50 		struct work_struct flush_work;
51 		struct rchan *channel;
52 		struct mutex lock;
53 		u32 full_count;
54 	} relay;
55 	/* logging related stats */
56 	struct {
57 		u32 sampled_overflow;
58 		u32 overflow;
59 		u32 flush;
60 	} stats[GUC_MAX_LOG_BUFFER];
61 };
62 
63 void intel_guc_log_init_early(struct intel_guc_log *log);
64 int intel_guc_log_create(struct intel_guc_log *log);
65 void intel_guc_log_destroy(struct intel_guc_log *log);
66 
67 int intel_guc_log_set_level(struct intel_guc_log *log, u32 level);
68 bool intel_guc_log_relay_enabled(const struct intel_guc_log *log);
69 int intel_guc_log_relay_open(struct intel_guc_log *log);
70 void intel_guc_log_relay_flush(struct intel_guc_log *log);
71 void intel_guc_log_relay_close(struct intel_guc_log *log);
72 
73 void intel_guc_log_handle_flush_event(struct intel_guc_log *log);
74 
75 static inline u32 intel_guc_log_get_level(struct intel_guc_log *log)
76 {
77 	return log->level;
78 }
79 
80 #endif
81