blob: d6bfd1bbdc2a8932fda0d7eb9e27c435671796e9 [file] [log] [blame]
// 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,
};
/* Older RPM firmwares have the stats at a fixed offset instead */
static const struct stats_config rpm_data_dba0 = {
.stats_offset = 0xdba0,
.num_records = 2,
.appended_stats_avail = true,
.dynamic_offset = false,
.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,apq8084-rpm-stats", .data = &rpm_data_dba0 },
{ .compatible = "qcom,msm8226-rpm-stats", .data = &rpm_data_dba0 },
{ .compatible = "qcom,msm8916-rpm-stats", .data = &rpm_data_dba0 },
{ .compatible = "qcom,msm8974-rpm-stats", .data = &rpm_data_dba0 },
{ .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");