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
16struct 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
45struct 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
63void intel_guc_log_init_early(struct intel_guc_log *log);
64int intel_guc_log_create(struct intel_guc_log *log);
65void intel_guc_log_destroy(struct intel_guc_log *log);
66
67int intel_guc_log_set_level(struct intel_guc_log *log, u32 level);
68bool intel_guc_log_relay_enabled(const struct intel_guc_log *log);
69int intel_guc_log_relay_open(struct intel_guc_log *log);
70void intel_guc_log_relay_flush(struct intel_guc_log *log);
71void intel_guc_log_relay_close(struct intel_guc_log *log);
72
73void intel_guc_log_handle_flush_event(struct intel_guc_log *log);
74
75static inline u32 intel_guc_log_get_level(struct intel_guc_log *log)
76{
77	return log->level;
78}
79
80#endif