summaryrefslogtreecommitdiff
path: root/drivers/hwtracing/coresight/coresight-cfg-afdo.c
blob: e794f2e145fad35a3fc835ea2d50b580d8889966 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright(C) 2020 Linaro Limited. All rights reserved.
 * Author: Mike Leach <mike.leach@linaro.org>
 */

#include "coresight-config.h"

/* ETMv4 includes and features */
#if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X)
#include "coresight-etm4x-cfg.h"
#include "coresight-cfg-preload.h"

/* preload configurations and features */

/* preload in features for ETMv4 */

/* strobe feature */
static struct cscfg_parameter_desc strobe_params[] = {
	{
		.name = "window",
		.value = 5000,
	},
	{
		.name = "period",
		.value = 10000,
	},
};

static struct cscfg_regval_desc strobe_regs[] = {
	/* resource selectors */
	{
		.type = CS_CFG_REG_TYPE_RESOURCE,
		.offset = TRCRSCTLRn(2),
		.hw_info = ETM4_CFG_RES_SEL,
		.val32 = 0x20001,
	},
	{
		.type = CS_CFG_REG_TYPE_RESOURCE,
		.offset = TRCRSCTLRn(3),
		.hw_info = ETM4_CFG_RES_SEQ,
		.val32 = 0x20002,
	},
	/* strobe window counter 0 - reload from param 0 */
	{
		.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_SAVE,
		.offset = TRCCNTVRn(0),
		.hw_info = ETM4_CFG_RES_CTR,
	},
	{
		.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_PARAM,
		.offset = TRCCNTRLDVRn(0),
		.hw_info = ETM4_CFG_RES_CTR,
		.val32 = 0,
	},
	{
		.type = CS_CFG_REG_TYPE_RESOURCE,
		.offset = TRCCNTCTLRn(0),
		.hw_info = ETM4_CFG_RES_CTR,
		.val32 = 0x10001,
	},
	/* strobe period counter 1 - reload from param 1 */
	{
		.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_SAVE,
		.offset = TRCCNTVRn(1),
		.hw_info = ETM4_CFG_RES_CTR,
	},
	{
		.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_PARAM,
		.offset = TRCCNTRLDVRn(1),
		.hw_info = ETM4_CFG_RES_CTR,
		.val32 = 1,
	},
	{
		.type = CS_CFG_REG_TYPE_RESOURCE,
		.offset = TRCCNTCTLRn(1),
		.hw_info = ETM4_CFG_RES_CTR,
		.val32 = 0x8102,
	},
	/* sequencer */
	{
		.type = CS_CFG_REG_TYPE_RESOURCE,
		.offset = TRCSEQEVRn(0),
		.hw_info = ETM4_CFG_RES_SEQ,
		.val32 = 0x0081,
	},
	{
		.type = CS_CFG_REG_TYPE_RESOURCE,
		.offset = TRCSEQEVRn(1),
		.hw_info = ETM4_CFG_RES_SEQ,
		.val32 = 0x0000,
	},
	/* view-inst */
	{
		.type = CS_CFG_REG_TYPE_STD | CS_CFG_REG_TYPE_VAL_MASK,
		.offset = TRCVICTLR,
		.val32 = 0x0003,
		.mask32 = 0x0003,
	},
	/* end of regs */
};

struct cscfg_feature_desc strobe_etm4x = {
	.name = "strobing",
	.description = "Generate periodic trace capture windows.\n"
		       "parameter \'window\': a number of CPU cycles (W)\n"
		       "parameter \'period\': trace enabled for W cycles every period x W cycles\n",
	.match_flags = CS_CFG_MATCH_CLASS_SRC_ETM4,
	.nr_params = ARRAY_SIZE(strobe_params),
	.params_desc = strobe_params,
	.nr_regs = ARRAY_SIZE(strobe_regs),
	.regs_desc = strobe_regs,
};

/* create an autofdo configuration */

/* we will provide 9 sets of preset parameter values */
#define AFDO_NR_PRESETS	9
/* the total number of parameters in used features */
#define AFDO_NR_PARAMS	ARRAY_SIZE(strobe_params)

static const char *afdo_ref_names[] = {
	"strobing",
};

/*
 * set of presets leaves strobing window constant while varying period to allow
 * experimentation with mark / space ratios for various workloads
 */
static u64 afdo_presets[AFDO_NR_PRESETS][AFDO_NR_PARAMS] = {
	{ 5000, 2 },
	{ 5000, 4 },
	{ 5000, 8 },
	{ 5000, 16 },
	{ 5000, 64 },
	{ 5000, 128 },
	{ 5000, 512 },
	{ 5000, 1024 },
	{ 5000, 4096 },
};

struct cscfg_config_desc afdo_etm4x = {
	.name = "autofdo",
	.description = "Setup ETMs with strobing for autofdo\n"
	"Supplied presets allow experimentation with mark-space ratio for various loads\n",
	.nr_feat_refs = ARRAY_SIZE(afdo_ref_names),
	.feat_ref_names = afdo_ref_names,
	.nr_presets = AFDO_NR_PRESETS,
	.nr_total_params = AFDO_NR_PARAMS,
	.presets = &afdo_presets[0][0],
};

/* end of ETM4x configurations */
#endif	/* IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X) */