// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright ( c ) 2011 - 2021 , The Linux Foundation . All rights reserved .
* Copyright ( c ) 2022 - 2025 , Qualcomm Innovation Center , Inc . All rights reserved .
*/
#include <linux/bitfield.h>
#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/qcom_aoss.h>
#include <linux/soc/qcom/smem.h>
#include <clocksource/arm_arch_timer.h>
#define RPM_DYNAMIC_ADDR 0 x14
#define RPM_DYNAMIC_ADDR_MASK 0 xFFFF
#define STAT_TYPE_OFFSET 0 x0
#define COUNT_OFFSET 0 x4
#define LAST_ENTERED_AT_OFFSET 0 x8
#define LAST_EXITED_AT_OFFSET 0 x10
#define ACCUMULATED_OFFSET 0 x18
#define CLIENT_VOTES_OFFSET 0 x20
#define DDR_STATS_MAGIC_KEY 0 xA1157A75
#define DDR_STATS_MAX_NUM_MODES 20
#define DDR_STATS_MAGIC_KEY_ADDR 0 x0
#define DDR_STATS_NUM_MODES_ADDR 0 x4
#define DDR_STATS_ENTRY_START_ADDR 0 x8
#define DDR_STATS_CP_IDX(data) FIELD_GET(GENMASK(4 , 0 ), data)
#define DDR_STATS_LPM_NAME(data) FIELD_GET(GENMASK(7 , 0 ), data)
#define DDR_STATS_TYPE(data) FIELD_GET(GENMASK(15 , 8 ), data)
#define DDR_STATS_FREQ(data) FIELD_GET(GENMASK(31 , 16 ), data)
static struct qmp *qcom_stats_qmp;
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 },
{ "cdsp1" , 607 , 12 },
{ "gpdsp0" , 607 , 17 },
{ "gpdsp1" , 607 , 18 },
{ "slpi" , 608 , 3 },
{ "gpu" , 609 , 0 },
{ "display" , 610 , 0 },
{ "adsp_island" , 613 , 2 },
{ "slpi_island" , 613 , 3 },
{ "apss" , 631 , QCOM_SMEM_HOST_ANY },
};
struct stats_config {
size_t stats_offset;
size_t ddr_stats_offset;
size_t num_records;
bool appended_stats_avail;
bool dynamic_offset;
bool subsystem_stats_in_smem;
};
struct ddr_stats_entry {
u32 name;
u32 count;
u64 duration;
};
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 0 ;
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 ;
}
static void qcom_ddr_stats_print(struct seq_file *s, struct ddr_stats_entry *data)
{
u32 cp_idx;
/*
* DDR statistic have two different types of details encoded .
* ( 1 ) DDR LPM Stats
* ( 2 ) DDR Frequency Stats
*
* The name field have details like which type of DDR stat ( bits 8 : 15 )
* along with other details as explained below
*
* In case of DDR LPM stat , name field will be encoded as ,
* Bits - Meaning
* 0 : 7 - DDR LPM name , can be of 0 xd4 , 0 xd3 , 0 x11 and 0 xd0 .
* 8 : 15 - 0 x0 ( indicates its a LPM stat )
* 16 : 31 - Unused
*
* In case of DDR FREQ stats , name field will be encoded as ,
* Bits - Meaning
* 0 : 4 - DDR Clock plan index ( CP IDX )
* 5 : 7 - Unused
* 8 : 15 - 0 x1 ( indicates its Freq stat )
* 16 : 31 - Frequency value in Mhz
*/
switch (DDR_STATS_TYPE(data->name)) {
case 0 :
seq_printf(s, "DDR LPM Stat Name:0x%lx\tcount:%u\tDuration (ticks):%llu\n" ,
DDR_STATS_LPM_NAME(data->name), data->count, data->duration);
break ;
case 1 :
if (!data->count || !DDR_STATS_FREQ(data->name))
return ;
cp_idx = DDR_STATS_CP_IDX(data->name);
seq_printf(s, "DDR Freq %luMhz:\tCP IDX:%u\tcount:%u\tDuration (ticks):%llu\n" ,
DDR_STATS_FREQ(data->name), cp_idx, data->count, data->duration);
break ;
}
}
static int qcom_ddr_stats_show(struct seq_file *s, void *d)
{
struct ddr_stats_entry data[DDR_STATS_MAX_NUM_MODES];
void __iomem *reg = (void __iomem *)s->private ;
u32 entry_count;
int i, ret;
entry_count = readl_relaxed(reg + DDR_STATS_NUM_MODES_ADDR);
if (entry_count > DDR_STATS_MAX_NUM_MODES)
return -EINVAL;
if (qcom_stats_qmp) {
/*
* Recent SoCs ( SM8450 onwards ) do not have duration field
* populated from boot up onwards for both DDR LPM Stats
* and DDR Frequency Stats .
*
* Send QMP message to Always on processor which will
* populate duration field into MSG RAM area .
*
* Sent every time to read latest data .
*/
ret = qmp_send(qcom_stats_qmp, "{class: ddr, action: freqsync}" );
if (ret)
return ret;
}
reg += DDR_STATS_ENTRY_START_ADDR;
memcpy_fromio(data, reg, sizeof (struct ddr_stats_entry) * entry_count);
for (i = 0 ; i < entry_count; i++)
qcom_ddr_stats_print(s, &data[i]);
return 0 ;
}
DEFINE_SHOW_ATTRIBUTE(qcom_soc_sleep_stats);
DEFINE_SHOW_ATTRIBUTE(qcom_subsystem_sleep_stats);
DEFINE_SHOW_ATTRIBUTE(qcom_ddr_stats);
static void qcom_create_ddr_stat_files(struct dentry *root, void __iomem *reg,
const struct stats_config *config)
{
u32 key;
if (!config->ddr_stats_offset)
return ;
key = readl_relaxed(reg + config->ddr_stats_offset + DDR_STATS_MAGIC_KEY_ADDR);
if (key == DDR_STATS_MAGIC_KEY)
debugfs_create_file("ddr_stats" , 0400 , root,
(__force void *)reg + config->ddr_stats_offset,
&qcom_ddr_stats_fops);
}
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 0 x14 offset from base
* address in devicetree . The last 16 bits 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 & 0 xff;
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)
{
int i;
if (!config->subsystem_stats_in_smem)
return ;
for (i = 0 ; i < ARRAY_SIZE(subsystems); i++)
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;
/*
* QMP is used for DDR stats syncing to MSG RAM for recent SoCs ( SM8450 onwards ) .
* The prior SoCs do not need QMP handle as the required stats are already present
* in MSG RAM , provided the DDR_STATS_MAGIC_KEY matches .
*/
qcom_stats_qmp = qmp_get(&pdev->dev);
if (IS_ERR(qcom_stats_qmp)) {
/* We ignore error if QMP is not defined/needed */
if (!of_property_present(pdev->dev.of_node, "qcom,qmp" ))
qcom_stats_qmp = NULL;
else if (PTR_ERR(qcom_stats_qmp) == -EPROBE_DEFER)
return -EPROBE_DEFER;
else
return PTR_ERR(qcom_stats_qmp);
}
root = debugfs_create_dir("qcom_stats" , NULL);
qcom_create_subsystem_stat_files(root, config);
qcom_create_soc_sleep_stat_files(root, reg, d, config);
qcom_create_ddr_stat_files(root, reg, config);
platform_set_drvdata(pdev, root);
device_set_pm_not_required(&pdev->dev);
return 0 ;
}
static void qcom_stats_remove(struct platform_device *pdev)
{
struct dentry *root = platform_get_drvdata(pdev);
debugfs_remove_recursive(root);
}
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 = 0 xdba0,
.num_records = 2 ,
.appended_stats_avail = true ,
.dynamic_offset = false ,
.subsystem_stats_in_smem = false ,
};
static const struct stats_config rpmh_data_sdm845 = {
.stats_offset = 0 x48,
.num_records = 2 ,
.appended_stats_avail = false ,
.dynamic_offset = false ,
.subsystem_stats_in_smem = true ,
};
static const struct stats_config rpmh_data = {
.stats_offset = 0 x48,
.ddr_stats_offset = 0 xb8,
.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 },
{ .compatible = "qcom,sdm845-rpmh-stats" , .data = &rpmh_data_sdm845 },
{ }
};
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" );
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