summaryrefslogtreecommitdiffstats
path: root/drivers/soc/qcom/qcom_stats.c
blob: 131d24caabf8d316ce9a3e6b9057d13d20fca629 (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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2011-2021, The Linux Foundation. All rights reserved.
 */

#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/seq_file.h>

#include <linux/soc/qcom/smem.h>
#include <clocksource/arm_arch_timer.h>

#define RPM_DYNAMIC_ADDR	0x14
#define RPM_DYNAMIC_ADDR_MASK	0xFFFF

#define STAT_TYPE_OFFSET	0x0
#define COUNT_OFFSET		0x4
#define LAST_ENTERED_AT_OFFSET	0x8
#define LAST_EXITED_AT_OFFSET	0x10
#define ACCUMULATED_OFFSET	0x18
#define CLIENT_VOTES_OFFSET	0x20

struct subsystem_data {
	const char *name;
	u32 smem_item;
	u32 pid;
};

static const struct subsystem_data subsystems[] = {
	{ "modem", 605, 1 },
	{ "wpss", 605, 13 },
	{ "adsp", 606, 2 },
	{ "cdsp", 607, 5 },
	{ "slpi", 608, 3 },
	{ "gpu", 609, 0 },
	{ "display", 610, 0 },
	{ "adsp_island", 613, 2 },
	{ "slpi_island", 613, 3 },
};

struct stats_config {
	size_t stats_offset;
	size_t num_records;
	bool appended_stats_avail;
	bool dynamic_offset;
	bool subsystem_stats_in_smem;
};

struct stats_data {
	bool appended_stats_avail;
	void __iomem *base;
};

struct sleep_stats {
	u32 stat_type;
	u32 count;
	u64 last_entered_at;
	u64 last_exited_at;
	u64 accumulated;
};

struct appended_stats {
	u32 client_votes;
	u32 reserved[3];
};

static void qcom_print_stats(struct seq_file *s, const struct sleep_stats *stat)
{
	u64 accumulated = stat->accumulated;
	/*
	 * If a subsystem is in sleep when reading the sleep stats adjust
	 * the accumulated sleep duration to show actual sleep time.
	 */
	if (stat->last_entered_at > stat->last_exited_at)
		accumulated += arch_timer_read_counter() - stat->last_entered_at;

	seq_printf(s, "Count: %u\n", stat->count);
	seq_printf(s, "Last Entered At: %llu\n", stat->last_entered_at);
	seq_printf(s, "Last Exited At: %llu\n", stat->last_exited_at);
	seq_printf(s, "Accumulated Duration: %llu\n", accumulated);
}

static int qcom_subsystem_sleep_stats_show(struct seq_file *s, void *unused)
{
	struct subsystem_data *subsystem = s->private;
	struct sleep_stats *stat;

	/* Items are allocated lazily, so lookup pointer each time */
	stat = qcom_smem_get(subsystem->pid, subsystem->smem_item, NULL);
	if (IS_ERR(stat))
		return -EIO;

	qcom_print_stats(s, stat);

	return 0;
}

static int qcom_soc_sleep_stats_show(struct seq_file *s, void *unused)
{
	struct stats_data *d = s->private;
	void __iomem *reg = d->base;
	struct sleep_stats stat;

	memcpy_fromio(&stat, reg, sizeof(stat));
	qcom_print_stats(s, &stat);

	if (d->appended_stats_avail) {
		struct appended_stats votes;

		memcpy_fromio(&votes, reg + CLIENT_VOTES_OFFSET, sizeof(votes));
		seq_printf(s, "Client Votes: %#x\n", votes.client_votes);
	}

	return 0;
}

DEFINE_SHOW_ATTRIBUTE(qcom_soc_sleep_stats);
DEFINE_SHOW_ATTRIBUTE(qcom_subsystem_sleep_stats);

static void qcom_create_soc_sleep_stat_files(struct dentry *root, void __iomem *reg,
					     struct stats_data *d,
					     const struct stats_config *config)
{
	char stat_type[sizeof(u32) + 1] = {0};
	size_t stats_offset = config->stats_offset;
	u32 offset = 0, type;
	int i, j;

	/*
	 * On RPM targets, stats offset location is dynamic and changes from target
	 * to target and sometimes from build to build for same target.
	 *
	 * In such cases the dynamic address is present at 0x14 offset from base
	 * address in devicetree. The last 16bits indicates the stats_offset.
	 */
	if (config->dynamic_offset) {
		stats_offset = readl(reg + RPM_DYNAMIC_ADDR);
		stats_offset &= RPM_DYNAMIC_ADDR_MASK;
	}

	for (i = 0; i < config->num_records; i++) {
		d[i].base = reg + offset + stats_offset;

		/*
		 * Read the low power mode name and create debugfs file for it.
		 * The names read could be of below,
		 * (may change depending on low power mode supported).
		 * For rpmh-sleep-stats: "aosd", "cxsd" and "ddr".
		 * For rpm-sleep-stats: "vmin" and "vlow".
		 */
		type = readl(d[i].base);
		for (j = 0; j < sizeof(u32); j++) {
			stat_type[j] = type & 0xff;
			type = type >> 8;
		}
		strim(stat_type);
		debugfs_create_file(stat_type, 0400, root, &d[i],
				    &qcom_soc_sleep_stats_fops);

		offset += sizeof(struct sleep_stats);
		if (d[i].appended_stats_avail)
			offset += sizeof(struct appended_stats);
	}
}

static void qcom_create_subsystem_stat_files(struct dentry *root,
					     const struct stats_config *config)
{
	const struct sleep_stats *stat;
	int i;

	if (!config->subsystem_stats_in_smem)
		return;

	for (i = 0; i < ARRAY_SIZE(subsystems); i++) {
		stat = qcom_smem_get(subsystems[i].pid, subsystems[i].smem_item, NULL);
		if (IS_ERR(stat))
			continue;

		debugfs_create_file(subsystems[i].name, 0400, root, (void *)&subsystems[i],
				    &qcom_subsystem_sleep_stats_fops);
	}
}

static int qcom_stats_probe(struct platform_device *pdev)
{
	void __iomem *reg;
	struct dentry *root;
	const struct stats_config *config;
	struct stats_data *d;
	int i;

	config = device_get_match_data(&pdev->dev);
	if (!config)
		return -ENODEV;

	reg = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
	if (IS_ERR(reg))
		return -ENOMEM;

	d = devm_kcalloc(&pdev->dev, config->num_records,
			 sizeof(*d), GFP_KERNEL);
	if (!d)
		return -ENOMEM;

	for (i = 0; i < config->num_records; i++)
		d[i].appended_stats_avail = config->appended_stats_avail;

	root = debugfs_create_dir("qcom_stats", NULL);

	qcom_create_subsystem_stat_files(root, config);
	qcom_create_soc_sleep_stat_files(root, reg, d, config);

	platform_set_drvdata(pdev, root);

	return 0;
}

static int qcom_stats_remove(struct platform_device *pdev)
{
	struct dentry *root = platform_get_drvdata(pdev);

	debugfs_remove_recursive(root);

	return 0;
}

static const struct stats_config rpm_data = {
	.stats_offset = 0,
	.num_records = 2,
	.appended_stats_avail = true,
	.dynamic_offset = true,
	.subsystem_stats_in_smem = false,
};

static const struct stats_config rpmh_data = {
	.stats_offset = 0x48,
	.num_records = 3,
	.appended_stats_avail = false,
	.dynamic_offset = false,
	.subsystem_stats_in_smem = true,
};

static const struct of_device_id qcom_stats_table[] = {
	{ .compatible = "qcom,rpm-stats", .data = &rpm_data },
	{ .compatible = "qcom,rpmh-stats", .data = &rpmh_data },
	{ }
};
MODULE_DEVICE_TABLE(of, qcom_stats_table);

static struct platform_driver qcom_stats = {
	.probe = qcom_stats_probe,
	.remove = qcom_stats_remove,
	.driver = {
		.name = "qcom_stats",
		.of_match_table = qcom_stats_table,
	},
};

static int __init qcom_stats_init(void)
{
	return platform_driver_register(&qcom_stats);
}
late_initcall(qcom_stats_init);

static void __exit qcom_stats_exit(void)
{
	platform_driver_unregister(&qcom_stats);
}
module_exit(qcom_stats_exit)

MODULE_DESCRIPTION("Qualcomm Technologies, Inc. (QTI) Stats driver");
MODULE_LICENSE("GPL v2");