blob: 3e1789fe8ff8451b353410aeca05c40bdd1c5840 [file] [log] [blame]
/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/of.h>
#include <asm/uaccess.h>
#include <mach/msm_iomap.h>
#include "rpm_stats.h"
#define RPM_MASTERS_BUF_LEN 400
#define SNPRINTF(buf, size, format, ...) \
do { \
if (size > 0) { \
int ret; \
ret = snprintf(buf, size, format, ## __VA_ARGS__); \
if (ret > size) { \
buf += size; \
size = 0; \
} else { \
buf += ret; \
size -= ret; \
} \
} \
} while (0)
#define GET_MASTER_NAME(a, prvdata) \
((a >= prvdata->num_masters) ? "Invalid Master Name" : \
prvdata->master_names[a])
#define GET_FIELD(a) ((strnstr(#a, ".", 80) + 1))
struct msm_rpm_master_stats {
uint32_t active_cores;
uint32_t numshutdowns;
uint64_t shutdown_req;
uint64_t wakeup_ind;
uint64_t bringup_req;
uint64_t bringup_ack;
uint32_t wakeup_reason; /* 0 = rude wakeup, 1 = scheduled wakeup */
uint32_t last_sleep_transition_duration;
uint32_t last_wake_transition_duration;
};
struct msm_rpm_master_stats_private_data {
void __iomem *reg_base;
u32 len;
char **master_names;
u32 num_masters;
char buf[RPM_MASTERS_BUF_LEN];
struct msm_rpm_master_stats_platform_data *platform_data;
};
int msm_rpm_master_stats_file_close(struct inode *inode,
struct file *file)
{
struct msm_rpm_master_stats_private_data *private = file->private_data;
if (private->reg_base)
iounmap(private->reg_base);
kfree(file->private_data);
return 0;
}
static int msm_rpm_master_copy_stats(
struct msm_rpm_master_stats_private_data *prvdata)
{
struct msm_rpm_master_stats record;
struct msm_rpm_master_stats_platform_data *pdata;
static int master_cnt;
int count, j = 0;
char *buf;
static DEFINE_MUTEX(msm_rpm_master_stats_mutex);
mutex_lock(&msm_rpm_master_stats_mutex);
/* Iterate possible number of masters */
if (master_cnt > prvdata->num_masters - 1) {
master_cnt = 0;
mutex_unlock(&msm_rpm_master_stats_mutex);
return 0;
}
pdata = prvdata->platform_data;
count = RPM_MASTERS_BUF_LEN;
buf = prvdata->buf;
if (prvdata->platform_data->version == 2) {
SNPRINTF(buf, count, "%s\n",
GET_MASTER_NAME(master_cnt, prvdata));
record.shutdown_req = readll_relaxed(prvdata->reg_base +
(master_cnt * pdata->master_offset +
offsetof(struct msm_rpm_master_stats, shutdown_req)));
SNPRINTF(buf, count, "\t%s:0x%llX\n",
GET_FIELD(record.shutdown_req),
record.shutdown_req);
record.wakeup_ind = readll_relaxed(prvdata->reg_base +
(master_cnt * pdata->master_offset +
offsetof(struct msm_rpm_master_stats, wakeup_ind)));
SNPRINTF(buf, count, "\t%s:0x%llX\n",
GET_FIELD(record.wakeup_ind),
record.wakeup_ind);
record.bringup_req = readll_relaxed(prvdata->reg_base +
(master_cnt * pdata->master_offset +
offsetof(struct msm_rpm_master_stats, bringup_req)));
SNPRINTF(buf, count, "\t%s:0x%llX\n",
GET_FIELD(record.bringup_req),
record.bringup_req);
record.bringup_ack = readll_relaxed(prvdata->reg_base +
(master_cnt * pdata->master_offset +
offsetof(struct msm_rpm_master_stats, bringup_ack)));
SNPRINTF(buf, count, "\t%s:0x%llX\n",
GET_FIELD(record.bringup_ack),
record.bringup_ack);
record.last_sleep_transition_duration =
readl_relaxed(prvdata->reg_base +
(master_cnt * pdata->master_offset +
offsetof(struct msm_rpm_master_stats,
last_sleep_transition_duration)));
SNPRINTF(buf, count, "\t%s:0x%x\n",
GET_FIELD(record.last_sleep_transition_duration),
record.last_sleep_transition_duration);
record.last_wake_transition_duration =
readl_relaxed(prvdata->reg_base +
(master_cnt * pdata->master_offset +
offsetof(struct msm_rpm_master_stats,
last_wake_transition_duration)));
SNPRINTF(buf, count, "\t%s:0x%x\n",
GET_FIELD(record.last_wake_transition_duration),
record.last_wake_transition_duration);
record.wakeup_reason = readl_relaxed(prvdata->reg_base +
(master_cnt * pdata->master_offset +
offsetof(struct msm_rpm_master_stats,
wakeup_reason)));
SNPRINTF(buf, count, "\t%s:0x%x\n",
GET_FIELD(record.wakeup_reason),
record.wakeup_reason);
record.numshutdowns = readl_relaxed(prvdata->reg_base +
(master_cnt * pdata->master_offset +
offsetof(struct msm_rpm_master_stats, numshutdowns)));
SNPRINTF(buf, count, "\t%s:0x%x\n",
GET_FIELD(record.numshutdowns),
record.numshutdowns);
record.active_cores = readl_relaxed(prvdata->reg_base +
(master_cnt * pdata->master_offset) +
offsetof(struct msm_rpm_master_stats, active_cores));
SNPRINTF(buf, count, "\t%s:0x%x\n",
GET_FIELD(record.active_cores),
record.active_cores);
} else {
SNPRINTF(buf, count, "%s\n",
GET_MASTER_NAME(master_cnt, prvdata));
record.numshutdowns = readl_relaxed(prvdata->reg_base +
(master_cnt * pdata->master_offset) + 0x0);
SNPRINTF(buf, count, "\t%s:0x%0x\n",
GET_FIELD(record.numshutdowns),
record.numshutdowns);
record.active_cores = readl_relaxed(prvdata->reg_base +
(master_cnt * pdata->master_offset) + 0x4);
SNPRINTF(buf, count, "\t%s:0x%0x\n",
GET_FIELD(record.active_cores),
record.active_cores);
}
j = find_first_bit((unsigned long *)&record.active_cores,
BITS_PER_LONG);
while (j < BITS_PER_LONG) {
SNPRINTF(buf, count, "\t\tcore%d\n", j);
j = find_next_bit((unsigned long *)&record.active_cores,
BITS_PER_LONG, j + 1);
}
master_cnt++;
mutex_unlock(&msm_rpm_master_stats_mutex);
return RPM_MASTERS_BUF_LEN - count;
}
static int msm_rpm_master_stats_file_read(struct file *file, char __user *bufu,
size_t count, loff_t *ppos)
{
struct msm_rpm_master_stats_private_data *prvdata;
struct msm_rpm_master_stats_platform_data *pdata;
prvdata = file->private_data;
if (!prvdata)
return -EINVAL;
pdata = prvdata->platform_data;
if (!pdata)
return -EINVAL;
if (!bufu || count == 0)
return -EINVAL;
if ((*ppos <= pdata->phys_size)) {
prvdata->len = msm_rpm_master_copy_stats(prvdata);
*ppos = 0;
}
return simple_read_from_buffer(bufu, count, ppos,
prvdata->buf, prvdata->len);
}
static int msm_rpm_master_stats_file_open(struct inode *inode,
struct file *file)
{
struct msm_rpm_master_stats_private_data *prvdata;
struct msm_rpm_master_stats_platform_data *pdata;
pdata = inode->i_private;
file->private_data =
kzalloc(sizeof(struct msm_rpm_master_stats_private_data),
GFP_KERNEL);
if (!file->private_data)
return -ENOMEM;
prvdata = file->private_data;
prvdata->reg_base = ioremap(pdata->phys_addr_base,
pdata->phys_size);
if (!prvdata->reg_base) {
kfree(file->private_data);
prvdata = NULL;
pr_err("%s: ERROR could not ioremap start=%p, len=%u\n",
__func__, (void *)pdata->phys_addr_base,
pdata->phys_size);
return -EBUSY;
}
prvdata->len = 0;
prvdata->num_masters = pdata->num_masters;
prvdata->master_names = pdata->masters;
prvdata->platform_data = pdata;
return 0;
}
static const struct file_operations msm_rpm_master_stats_fops = {
.owner = THIS_MODULE,
.open = msm_rpm_master_stats_file_open,
.read = msm_rpm_master_stats_file_read,
.release = msm_rpm_master_stats_file_close,
.llseek = no_llseek,
};
static struct msm_rpm_master_stats_platform_data
*msm_rpm_master_populate_pdata(struct device *dev)
{
struct msm_rpm_master_stats_platform_data *pdata;
struct device_node *node = dev->of_node;
int rc = 0, i;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata) {
dev_err(dev, "could not allocate memory for platform data\n");
goto err;
}
rc = of_property_read_u32(node, "qcom,master-stats-version",
&pdata->version);
if (rc) {
dev_err(dev, "master-stats-version missing rc=%d\n", rc);
goto err;
}
rc = of_property_read_u32(node, "qcom,master-offset",
&pdata->master_offset);
if (rc) {
dev_err(dev, "master-offset missing rc=%d\n", rc);
goto err;
}
pdata->num_masters = of_property_count_strings(node, "qcom,masters");
if (pdata->num_masters < 0) {
dev_err(dev, "Failed to get number of masters =%d\n",
pdata->num_masters);
goto err;
}
pdata->masters = devm_kzalloc(dev, sizeof(char *) * pdata->num_masters,
GFP_KERNEL);
if (!pdata->masters) {
dev_err(dev, "%s:Failed to allocated memory\n", __func__);
goto err;
}
/*
* Read master names from DT
*/
for (i = 0; i < pdata->num_masters; i++) {
const char *master_name;
of_property_read_string_index(node, "qcom,masters",
i, &master_name);
pdata->masters[i] = devm_kzalloc(dev, sizeof(char) *
strlen(master_name) + 1, GFP_KERNEL);
if (!pdata->masters[i]) {
dev_err(dev, "%s:Failed to get memory\n", __func__);
goto err;
}
strlcpy(pdata->masters[i], master_name,
strlen(master_name) + 1);
}
return pdata;
err:
return NULL;
}
static int __devinit msm_rpm_master_stats_probe(struct platform_device *pdev)
{
struct dentry *dent;
struct msm_rpm_master_stats_platform_data *pdata;
struct resource *res = NULL;
if (!pdev)
return -EINVAL;
if (pdev->dev.of_node)
pdata = msm_rpm_master_populate_pdata(&pdev->dev);
else
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "%s: Unable to get pdata\n", __func__);
return -ENOMEM;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev,
"%s: Failed to get IO resource from platform device",
__func__);
return -ENXIO;
}
pdata->phys_addr_base = res->start;
pdata->phys_size = resource_size(res);
dent = debugfs_create_file("rpm_master_stats", S_IRUGO, NULL,
pdata, &msm_rpm_master_stats_fops);
if (!dent) {
dev_err(&pdev->dev, "%s: ERROR debugfs_create_file failed\n",
__func__);
return -ENOMEM;
}
platform_set_drvdata(pdev, dent);
return 0;
}
static int __devexit msm_rpm_master_stats_remove(struct platform_device *pdev)
{
struct dentry *dent;
dent = platform_get_drvdata(pdev);
debugfs_remove(dent);
platform_set_drvdata(pdev, NULL);
return 0;
}
static struct of_device_id rpm_master_table[] = {
{.compatible = "qcom,rpm-master-stats"},
{},
};
static struct platform_driver msm_rpm_master_stats_driver = {
.probe = msm_rpm_master_stats_probe,
.remove = __devexit_p(msm_rpm_master_stats_remove),
.driver = {
.name = "msm_rpm_master_stats",
.owner = THIS_MODULE,
.of_match_table = rpm_master_table,
},
};
static int __init msm_rpm_master_stats_init(void)
{
return platform_driver_register(&msm_rpm_master_stats_driver);
}
static void __exit msm_rpm_master_stats_exit(void)
{
platform_driver_unregister(&msm_rpm_master_stats_driver);
}
module_init(msm_rpm_master_stats_init);
module_exit(msm_rpm_master_stats_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("MSM RPM Master Statistics driver");
MODULE_VERSION("1.0");
MODULE_ALIAS("platform:msm_master_stat_log");