From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/opp/debugfs.c | 279 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 279 insertions(+) create mode 100644 drivers/opp/debugfs.c (limited to 'drivers/opp/debugfs.c') diff --git a/drivers/opp/debugfs.c b/drivers/opp/debugfs.c new file mode 100644 index 0000000000..17543c0aa5 --- /dev/null +++ b/drivers/opp/debugfs.c @@ -0,0 +1,279 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Generic OPP debugfs interface + * + * Copyright (C) 2015-2016 Viresh Kumar + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include +#include + +#include "opp.h" + +static struct dentry *rootdir; + +static void opp_set_dev_name(const struct device *dev, char *name) +{ + if (dev->parent) + snprintf(name, NAME_MAX, "%s-%s", dev_name(dev->parent), + dev_name(dev)); + else + snprintf(name, NAME_MAX, "%s", dev_name(dev)); +} + +void opp_debug_remove_one(struct dev_pm_opp *opp) +{ + debugfs_remove_recursive(opp->dentry); +} + +static ssize_t bw_name_read(struct file *fp, char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct icc_path *path = fp->private_data; + char buf[64]; + int i; + + i = scnprintf(buf, sizeof(buf), "%.62s\n", icc_get_name(path)); + + return simple_read_from_buffer(userbuf, count, ppos, buf, i); +} + +static const struct file_operations bw_name_fops = { + .open = simple_open, + .read = bw_name_read, + .llseek = default_llseek, +}; + +static void opp_debug_create_bw(struct dev_pm_opp *opp, + struct opp_table *opp_table, + struct dentry *pdentry) +{ + struct dentry *d; + char name[11]; + int i; + + for (i = 0; i < opp_table->path_count; i++) { + snprintf(name, sizeof(name), "icc-path-%.1d", i); + + /* Create per-path directory */ + d = debugfs_create_dir(name, pdentry); + + debugfs_create_file("name", S_IRUGO, d, opp_table->paths[i], + &bw_name_fops); + debugfs_create_u32("peak_bw", S_IRUGO, d, + &opp->bandwidth[i].peak); + debugfs_create_u32("avg_bw", S_IRUGO, d, + &opp->bandwidth[i].avg); + } +} + +static void opp_debug_create_clks(struct dev_pm_opp *opp, + struct opp_table *opp_table, + struct dentry *pdentry) +{ + char name[12]; + int i; + + if (opp_table->clk_count == 1) { + debugfs_create_ulong("rate_hz", S_IRUGO, pdentry, &opp->rates[0]); + return; + } + + for (i = 0; i < opp_table->clk_count; i++) { + snprintf(name, sizeof(name), "rate_hz_%d", i); + debugfs_create_ulong(name, S_IRUGO, pdentry, &opp->rates[i]); + } +} + +static void opp_debug_create_supplies(struct dev_pm_opp *opp, + struct opp_table *opp_table, + struct dentry *pdentry) +{ + struct dentry *d; + int i; + + for (i = 0; i < opp_table->regulator_count; i++) { + char name[15]; + + snprintf(name, sizeof(name), "supply-%d", i); + + /* Create per-opp directory */ + d = debugfs_create_dir(name, pdentry); + + debugfs_create_ulong("u_volt_target", S_IRUGO, d, + &opp->supplies[i].u_volt); + + debugfs_create_ulong("u_volt_min", S_IRUGO, d, + &opp->supplies[i].u_volt_min); + + debugfs_create_ulong("u_volt_max", S_IRUGO, d, + &opp->supplies[i].u_volt_max); + + debugfs_create_ulong("u_amp", S_IRUGO, d, + &opp->supplies[i].u_amp); + + debugfs_create_ulong("u_watt", S_IRUGO, d, + &opp->supplies[i].u_watt); + } +} + +void opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table) +{ + struct dentry *pdentry = opp_table->dentry; + struct dentry *d; + unsigned long id; + char name[25]; /* 20 chars for 64 bit value + 5 (opp:\0) */ + + /* + * Get directory name for OPP. + * + * - Normally rate is unique to each OPP, use it to get unique opp-name. + * - For some devices rate isn't available or there are multiple, use + * index instead for them. + */ + if (likely(opp_table->clk_count == 1 && opp->rates[0])) + id = opp->rates[0]; + else + id = _get_opp_count(opp_table); + + snprintf(name, sizeof(name), "opp:%lu", id); + + /* Create per-opp directory */ + d = debugfs_create_dir(name, pdentry); + + debugfs_create_bool("available", S_IRUGO, d, &opp->available); + debugfs_create_bool("dynamic", S_IRUGO, d, &opp->dynamic); + debugfs_create_bool("turbo", S_IRUGO, d, &opp->turbo); + debugfs_create_bool("suspend", S_IRUGO, d, &opp->suspend); + debugfs_create_u32("level", S_IRUGO, d, &opp->level); + debugfs_create_ulong("clock_latency_ns", S_IRUGO, d, + &opp->clock_latency_ns); + + opp->of_name = of_node_full_name(opp->np); + debugfs_create_str("of_name", S_IRUGO, d, (char **)&opp->of_name); + + opp_debug_create_clks(opp, opp_table, d); + opp_debug_create_supplies(opp, opp_table, d); + opp_debug_create_bw(opp, opp_table, d); + + opp->dentry = d; +} + +static void opp_list_debug_create_dir(struct opp_device *opp_dev, + struct opp_table *opp_table) +{ + const struct device *dev = opp_dev->dev; + struct dentry *d; + + opp_set_dev_name(dev, opp_table->dentry_name); + + /* Create device specific directory */ + d = debugfs_create_dir(opp_table->dentry_name, rootdir); + + opp_dev->dentry = d; + opp_table->dentry = d; +} + +static void opp_list_debug_create_link(struct opp_device *opp_dev, + struct opp_table *opp_table) +{ + char name[NAME_MAX]; + + opp_set_dev_name(opp_dev->dev, name); + + /* Create device specific directory link */ + opp_dev->dentry = debugfs_create_symlink(name, rootdir, + opp_table->dentry_name); +} + +/** + * opp_debug_register - add a device opp node to the debugfs 'opp' directory + * @opp_dev: opp-dev pointer for device + * @opp_table: the device-opp being added + * + * Dynamically adds device specific directory in debugfs 'opp' directory. If the + * device-opp is shared with other devices, then links will be created for all + * devices except the first. + */ +void opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table) +{ + if (opp_table->dentry) + opp_list_debug_create_link(opp_dev, opp_table); + else + opp_list_debug_create_dir(opp_dev, opp_table); +} + +static void opp_migrate_dentry(struct opp_device *opp_dev, + struct opp_table *opp_table) +{ + struct opp_device *new_dev = NULL, *iter; + const struct device *dev; + struct dentry *dentry; + + /* Look for next opp-dev */ + list_for_each_entry(iter, &opp_table->dev_list, node) + if (iter != opp_dev) { + new_dev = iter; + break; + } + + BUG_ON(!new_dev); + + /* new_dev is guaranteed to be valid here */ + dev = new_dev->dev; + debugfs_remove_recursive(new_dev->dentry); + + opp_set_dev_name(dev, opp_table->dentry_name); + + dentry = debugfs_rename(rootdir, opp_dev->dentry, rootdir, + opp_table->dentry_name); + if (IS_ERR(dentry)) { + dev_err(dev, "%s: Failed to rename link from: %s to %s\n", + __func__, dev_name(opp_dev->dev), dev_name(dev)); + return; + } + + new_dev->dentry = dentry; + opp_table->dentry = dentry; +} + +/** + * opp_debug_unregister - remove a device opp node from debugfs opp directory + * @opp_dev: opp-dev pointer for device + * @opp_table: the device-opp being removed + * + * Dynamically removes device specific directory from debugfs 'opp' directory. + */ +void opp_debug_unregister(struct opp_device *opp_dev, + struct opp_table *opp_table) +{ + if (opp_dev->dentry == opp_table->dentry) { + /* Move the real dentry object under another device */ + if (!list_is_singular(&opp_table->dev_list)) { + opp_migrate_dentry(opp_dev, opp_table); + goto out; + } + opp_table->dentry = NULL; + } + + debugfs_remove_recursive(opp_dev->dentry); + +out: + opp_dev->dentry = NULL; +} + +static int __init opp_debug_init(void) +{ + /* Create /sys/kernel/debug/opp directory */ + rootdir = debugfs_create_dir("opp", NULL); + + return 0; +} +core_initcall(opp_debug_init); -- cgit v1.2.3