| /* Copyright (c) 2012-2014, 2016-2017 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 <linux/uaccess.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_platform_data { |
| phys_addr_t phys_addr_base; |
| u32 phys_size; |
| char **masters; |
| /* |
| * RPM maintains PC stats for each master in MSG RAM, |
| * it allocates 256 bytes for this use. |
| * No of masters differs for different targets. |
| * Based on the number of masters, linux rpm stat |
| * driver reads (32 * num_masters) bytes to display |
| * master stats. |
| */ |
| s32 num_masters; |
| u32 master_offset; |
| u32 version; |
| }; |
| |
| static DEFINE_MUTEX(msm_rpm_master_stats_mutex); |
| |
| 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; |
| uint32_t xo_count; |
| uint64_t xo_last_entered_at; |
| uint64_t xo_last_exited_at; |
| uint64_t xo_accumulated_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; |
| }; |
| |
| static int msm_rpm_master_stats_file_close(struct inode *inode, |
| struct file *file) |
| { |
| struct msm_rpm_master_stats_private_data *private = file->private_data; |
| |
| mutex_lock(&msm_rpm_master_stats_mutex); |
| if (private->reg_base) |
| iounmap(private->reg_base); |
| kfree(file->private_data); |
| mutex_unlock(&msm_rpm_master_stats_mutex); |
| |
| 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; |
| unsigned long active_cores; |
| |
| /* Iterate possible number of masters */ |
| if (master_cnt > prvdata->num_masters - 1) { |
| master_cnt = 0; |
| 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 = readq_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 = readq_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 = readq_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 = readq_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.xo_last_entered_at = readq_relaxed(prvdata->reg_base + |
| (master_cnt * pdata->master_offset + |
| offsetof(struct msm_rpm_master_stats, |
| xo_last_entered_at))); |
| |
| SNPRINTF(buf, count, "\t%s:0x%llX\n", |
| GET_FIELD(record.xo_last_entered_at), |
| record.xo_last_entered_at); |
| |
| record.xo_last_exited_at = readq_relaxed(prvdata->reg_base + |
| (master_cnt * pdata->master_offset + |
| offsetof(struct msm_rpm_master_stats, |
| xo_last_exited_at))); |
| |
| SNPRINTF(buf, count, "\t%s:0x%llX\n", |
| GET_FIELD(record.xo_last_exited_at), |
| record.xo_last_exited_at); |
| |
| record.xo_accumulated_duration = |
| readq_relaxed(prvdata->reg_base + |
| (master_cnt * pdata->master_offset + |
| offsetof(struct msm_rpm_master_stats, |
| xo_accumulated_duration))); |
| |
| SNPRINTF(buf, count, "\t%s:0x%llX\n", |
| GET_FIELD(record.xo_accumulated_duration), |
| record.xo_accumulated_duration); |
| |
| 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.xo_count = |
| readl_relaxed(prvdata->reg_base + |
| (master_cnt * pdata->master_offset + |
| offsetof(struct msm_rpm_master_stats, |
| xo_count))); |
| |
| SNPRINTF(buf, count, "\t%s:0x%x\n", |
| GET_FIELD(record.xo_count), |
| record.xo_count); |
| |
| 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); |
| } |
| |
| active_cores = record.active_cores; |
| j = find_first_bit(&active_cores, BITS_PER_LONG); |
| while (j < (BITS_PER_LONG - 1)) { |
| SNPRINTF(buf, count, "\t\tcore%d\n", j); |
| j = find_next_bit((const unsigned long *)&active_cores, |
| BITS_PER_LONG, j + 1); |
| } |
| |
| if (j == (BITS_PER_LONG - 1)) |
| SNPRINTF(buf, count, "\t\tcore%d\n", j); |
| |
| master_cnt++; |
| return RPM_MASTERS_BUF_LEN - count; |
| } |
| |
| static ssize_t 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; |
| ssize_t ret; |
| |
| mutex_lock(&msm_rpm_master_stats_mutex); |
| prvdata = file->private_data; |
| if (!prvdata) { |
| ret = -EINVAL; |
| goto exit; |
| } |
| |
| pdata = prvdata->platform_data; |
| if (!pdata) { |
| ret = -EINVAL; |
| goto exit; |
| } |
| |
| if (!bufu || count == 0) { |
| ret = -EINVAL; |
| goto exit; |
| } |
| |
| if (*ppos <= pdata->phys_size) { |
| prvdata->len = msm_rpm_master_copy_stats(prvdata); |
| *ppos = 0; |
| } |
| |
| ret = simple_read_from_buffer(bufu, count, ppos, |
| prvdata->buf, prvdata->len); |
| exit: |
| mutex_unlock(&msm_rpm_master_stats_mutex); |
| return ret; |
| } |
| |
| 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; |
| int ret = 0; |
| |
| mutex_lock(&msm_rpm_master_stats_mutex); |
| pdata = inode->i_private; |
| |
| file->private_data = |
| kzalloc(sizeof(struct msm_rpm_master_stats_private_data), |
| GFP_KERNEL); |
| |
| if (!file->private_data) { |
| ret = -ENOMEM; |
| goto exit; |
| } |
| |
| 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=%pa, len=%u\n", |
| __func__, &pdata->phys_addr_base, |
| pdata->phys_size); |
| ret = -EBUSY; |
| goto exit; |
| } |
| |
| prvdata->len = 0; |
| prvdata->num_masters = pdata->num_masters; |
| prvdata->master_names = pdata->masters; |
| prvdata->platform_data = pdata; |
| exit: |
| mutex_unlock(&msm_rpm_master_stats_mutex); |
| return ret; |
| } |
| |
| 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) |
| 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) |
| 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]) |
| goto err; |
| strlcpy(pdata->masters[i], master_name, |
| strlen(master_name) + 1); |
| } |
| return pdata; |
| err: |
| return NULL; |
| } |
| |
| static int 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", 0444, 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 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 const 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 = 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_ALIAS("platform:msm_master_stat_log"); |